2 years ago

9th question help ?!

1 answer:

5 0

Hey there! :)

You have to find the area of all of them and add it together.

Formulas:

Area of a square: l · w
Area of a triangle: (b · h) ÷ 2

Square -

l = 3
w = 3

3 × 3 = 9

Triangle -

b = 3
h = 3

(3 × 3) ÷ 2
9 ÷ 2 = 4.5

There are 4 triangles

4.5 × 4 = 18

9 + 18 = 27

The surface area ⇒ 27 cm²

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