Question

How many triangles are needed to compose a region that is 1 1/2 square meters?

Answer 1

A square with an area of 1 square meter is decomposed into 9 identical small squares. Each small square is decomposed into two identical triangles.

1 square meter is decomposed into 9 identical small squares

So there are 9 small squares in 1 square meter.

Each small square is decomposed into two identical triangles

So 9 small squares is decomposed into 9*2=18 identical triangles

Hence, 1 square meter is decomposed into 18 identical triangles.

WE need to find number of triangles are needed to compose a region that is
`1(1)/(2)` square meters

`1(1)/(2)` square meters = 1.5 square meters

1 square meter = 18 identical triangles.

1.5 square meters = 1.5 * 18 = 27 identical triangles.

There are 27 triangles are needed to compose a region that is 1 1/2 square meters.