Surface area of rectangular prisms with fractional edges
Find the area of the three different faces, add them, then double the total. Write the answer in lowest terms, as a mixed number if needed, like 3 1/2.
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A rectangular prism is 1 cm long, 1 1/2 cm wide and 1 1/2 cm tall. What is its surface area in square centimeters?
Answer: 10 1/2
A rectangular prism is 1/2 cm long, 1 1/2 cm wide and 1/2 cm tall. What is its surface area in square centimeters?
Answer: 3 1/2
A rectangular prism is 2 in long, 1 in wide and 1/2 in tall. What is its surface area in square inches?
Answer: 7
Tip: Find the area of the three different faces, add them, then double the total. Write the answer in lowest terms, as a mixed number if needed, like 3 1/2.
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