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Episode 2 of 3

The side of a square made of four triangles

The question

Shape P is a right-angled triangle with a base of 9 cm and a height of 12 cm. Jaya cuts out four of these triangles and glues them onto a card to make Shape Q, shown below. How long is each side of the big square in Shape Q?

Try it first, then show the answer

Answer

15 cm

Look

More in this topic

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Episode 1

Build a right-angled triangle from paper pieces
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Episode 2 · Now playing

The side of a square made of four triangles
0:24

Episode 3

Two ways to the area of a thin triangle