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OpenStudy (anonymous):
PLEASE HELP!! A solid has faces that consist of 5 congruent squares and 4 congruent equilateral triangles. The solid has 9 vertices. How many edges does the solid have? A. 16 edges B. 18 edges C. 20 edges D. 22 edges
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OpenStudy (amistre64):
doesnt euler have a formula for this stuff?
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