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mezya [45]
3 years ago
12

The dimensions for the net of a triangular prism are given in the picture in centimeters.

Mathematics
1 answer:
Lelechka [254]3 years ago
3 0

Answer:

B) 23 cm2

Step-by-step explanation:

we know that

The surface area of the triangular prism is equal to the area of three rectangular faces plus two triangular faces

Convert mixed number to improper fractions

2\frac{1}{2}=2+\frac{1}{2}=\frac{5}{2}\ cm

3\frac{1}{2}=3+\frac{1}{2}=\frac{7}{2}\ cm

1\frac{1}{2}=1+\frac{1}{2}=\frac{3}{2}\ cm

so

SA=2[(3)(\frac{3}{2})]+[(\frac{7}{2})(\frac{3}{2})]+2[\frac{1}{2}(\frac{7}{2})(\frac{5}{2})]

SA=9+5.25+8.75=23\ cm^2

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Step-by-step explanation:


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