Given:
Right triangular prism
To find:
The surface area of the right triangular prism
Solution:
<u>Using nets of the prism:</u>
Area of large rectangle = length × width
= 7 × 5
Area of large rectangle = 35 square units
Area of middle rectangle = length × width
= 7 × 4
Area of middle rectangle = 28 square units
Area of small rectangle = length × width
= 7 × 3
Area of small rectangle = 21 square units
Area of top triangle =
Area of top triangle = 6 square units
Area of bottom triangle =
Area of bottom triangle = 6 square units
Total surface area = 35 + 28 + 21 + 6 + 6
= 96 square units
The surface area of the right triangular prism is 96 square units.