Question

Please help see picture

Answer 1

688 cm²

Step-by-step explanation:

Area of triangular prism = Base × Height + Length × (perimeter of base)

Here given:

• Base: 6 cm

• Height: 12 cm

• Length: 20 cm

• Perimeter of Base: (6 + 12.4 + 12.4) = 30.8 cm

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Surface Area = 6 × 12 + 20 × (30.8) = 688 cm²