Question

guided practice
surface areas of prisms and cylinders
type your answer and then click or tap done.
use the net to find the surface area of the prism.
mm²
triangular prism and net

Explanation:

Step1: Calculate area of triangular bases

Area of one triangle: $\frac{1}{2} \times 3 \times 4 = 6$ mm². Two triangles: $2 \times 6 = 12$ mm².

Step2: Calculate area of rectangular faces

Face1: $3 \times 8 = 24$ mm²; Face2: $4 \times 8 = 32$ mm²; Face3: $5 \times 8 = 40$ mm². Sum: $24 + 32 + 40 = 96$ mm².

Step3: Total surface area

Add triangle and rectangle areas: $12 + 96 = 108$ mm².

Answer:

108 mm²