Question

Please answer the following question for 85 points.

Answer 1

188.4 cm²

Explanation:

Surface area of rectangles :-

• A = 15cm * 5 cm * 2
• A = 150 cm²

Surface area of triangles :-

• A = 2 * 1/2 * 4cm * 4.6 cm
• A = 18.4 cm²

Surface area of middle rectangle :-

• A = 4cm * 5cm
• A = 20 cm²

Total Area :-

• A = ( 150 + 18.4 + 20 ) cm²
• A = 188.4 cm²

Answer 2

Solution given:

Total surface area of triangular prism=

area of two triangle +2*area of rectangle+area of base

=2*½*4*4.6+2*15*5+15*4

=228.4cm²

The area of triangular prism=228.4cm²