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docker41 [41]
3 years ago
12

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

Mathematics
1 answer:
labwork [276]3 years ago
6 0

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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You want:

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