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Can someone help me with this please? thank you!

Can someone help me with this please? thank you!-example-1
User CyberAP
by
8.7k points

1 Answer

6 votes

Answer:

106 cm²

Explanation:

the surface area is the sum of the areas of the faces of the prism

area of 2 rectangles (left/ right ) = 2 × 7 × 5 = 70 cm²

area of central rectangle = 3 × 7 = 21 cm²

area of 2 congruent triangles = 2 ×
(1)/(2) × 3 × 5 = 3 × 5 = 15 cm²

surface area = 70 + 21 + 15 = 106 cm²

User Alexander Meise
by
8.0k points

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