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Mathematics 14 Online
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

OpenStudy (amistre64):

doesnt euler have a formula for this stuff?

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