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OpenStudy (anonymous):
What is the surface area of a triangular pyramid if each face has an area of 30 mm2? A. 120 mm2 B. 60 mm2 C. 90 mm2 D. 160 mm2
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OpenStudy (liv1234):
90.
OpenStudy (liv1234):
A triangle has three sides.
OpenStudy (liv1234):
\[30*3=90\]
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