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  • 11-07-2020
  • Mathematics
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Find the total surface area of this triangular prism 13cm 5cm 12cm 9cm 15cm 20cm

Find the total surface area of this triangular prism 13cm 5cm 12cm 9cm 15cm 20cm class=

Respuesta :

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  • 11-07-2020

Answer:

924 cm²

Step-by-step explanation:

The surface area is equal to the area of the two triangles + area of the three rectangles.

Area of two triangles:

12 × (9+5) × 1/2

= 84

84(2) = 168

Area of the three rectangles:

15 × 20 + 13 × 20 + 14 × 20

= 840

840 + 84

The surface area of the triangular prism is 924 cm².

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