Respuesta :

Creati
Hey there! :)

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

Let's start with the 3 rectangles

Formula = l × w

6 × 3 = 18
6 × 4 = 24
6 × 5 = 30

Now, the 2 triangles

Formula = (b × h) ÷ 2

Both triangles are the same:

(5 × 2) ÷ 2 = 10 ÷ 2 = 5
(5 × 2) ÷ 2 = 10 ÷ 2 = 5

Add all of them

18 + 24 + 30 + 5 + 5 = 82

The surface area = 82 cm²

Hope this helps :)

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