Question

The diagram represents the net of a triangular prism. Chris wants to find thesurface area.

Answer 1

Answer:

Total Surface Area of the Prism=640 square meters

Chris made a mistake in calculating the area of the rectangular base.

Step-by-step explanation:

Dimension of the Triangle

Base=16m, Height=15m

Area of the Two triangular Faces =0.5 X 16 X 15 X 2=240 square meters

This is correct

Dimensions of the Rectangles

16m by 8m, 17m by 8m, 17m by 8m

Area of the Rectangular Faces=(17X8)+(17X8)+(16X8)=400 square meters

• Total Surface Area of the Prism=240+400=640 square meters

• Chris' Error was in calculating the area of the base of the prism as (17 x 8) instead of (16 X 8).