explanation

2018-01-23 · 첨삭 강사 Amanda

학생이 쓴 원문

The shape square is also can be rectagle. Because the meaning of sqares inclueds rectangles. Retangle means "The shape that have 4 equal angles." And square means " The shape that have 4 equal angles and sides." That is why I the shape square is also can be rectagle.

강사 첨삭

Hi Kid,

Thanks for clarifying your answer.

I now understand what you mean.

Definition: A rectangle is a quadrilateral with all four angles right angles.

A rectangle can be tall and thin, short and fat or all the sides can have the same length.

Definition: A square is a quadrilateral with all four angles right angles and all four sides of the same length.

Definition: quadrilateral means having four sides.

So a square is a special kind of rectangle, it is one where all the sides have the same length. Thus, every square is a rectangle because it is a quadrilateral with all four angles right angles. However, not every rectangle is a square, to be a square its sides must have the same length.

Cheers!

Amanda ^-^

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