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학년 · 단어 84개 · 표현 57개 · Q&A 0개
초등영어 리딩이 된다 Jump 3
단어84 words
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Greek
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mathematician
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street
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heard
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sound
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hammer
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some
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good
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harmony
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music
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curious
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start
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observe
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different
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weight
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made
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light
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high
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heavy
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low
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same
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rule
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harp
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had
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string
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length
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shorter
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higher
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longer
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lower
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mathematical
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one
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great
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pyramid
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Egypt
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glass
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museum
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look
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similar
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call
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them
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square
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because
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both
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have
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base
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four
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side
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all
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triangle
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various
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type
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shape
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their
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triangular
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pentagon
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pentagonal
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now
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can
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find
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and
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each
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receive
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piece
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ice
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seem
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taller
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than
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but
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wider
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which
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bigger
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how
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we
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compare
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measure
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volume
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cm
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width
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height
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multiply
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result
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cm3
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therefore
문장57 expressions
Enter 또는 + 버튼을 눌러 추가하세요. 항목에 마우스를 올려 편집하거나 삭제하세요.
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walk down
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just like
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found ~ out
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think of
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there are
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look at
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look around
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by ~ing
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~ in width
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~ in length
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~ in height
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Pythagoras was a Greek mathematician.
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One day, he walked down a street.
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He heard the sound of hammers.
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Some of the hammers were in good harmony.
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It sounded just like music!
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He was curious about the sound.
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So he started observing the hammers.
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He found this out.
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The different weights of hammers made different sounds.
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The light hammers made high sounds.
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The heavy hammers made low sounds.
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He found the same rule for the harp.
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The harp had many strings of different lengths.
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The shorter the string was, the higher the sound was.
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The longer the string was, the lower the sound was.
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Pythagoras found mathematical rules in music!
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Think of one of the Great Pyramids in Egypt.
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Think of the glass pyramid at the Louvre Museum.
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They look similar.
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We call them square pyramids.
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It's because they both have square bases.
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They both have four sides.
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The four sides are all triangles.
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There are various types of pyramids.
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The shapes of their bases are different.
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Look at this type of pyramid.
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The base of this pyramid is a triangle.
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We call this a triangular pyramid.
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The base of this pyramid is a pentagon.
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So it is a pentagonal pyramid.
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Now look around you.
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What type of pyramids can you find?
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Jenny and Eric each received a piece of ice.
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Jenny’s piece of ice seems taller than Eric’s.
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But Eric’s piece of ice seems wider than Jenny’s.
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Which one is bigger? How do we compare them?
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We compare them by measuring their volumes.
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Jenny’s piece of ice is 4 cm in width.
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It is 2 cm in length and 7 cm in height.
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Eric’s piece of ice is 8cm in width.
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It is 2 cm in length and 3 cm in height.
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Multiply width, length, and height.
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The result is the volume.
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The volume of Jenny’s piece of ice is 56.
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The volume of Eric’s piece of ice is 48.
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Therefore, Jenny’s piece of ice is bigger!
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