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Mathematics 10 Online
OpenStudy (anonymous):

im kinda stuck can someone please help me? Which solid figure has nine edges? rectangular pyramid octagonal pyramid rectangular prism triangular prism

OpenStudy (mathstudent55):

|dw:1437542778360:dw|

OpenStudy (anonymous):

Triangular Prism.

OpenStudy (mathstudent55):

We can use Euler's formula F + V - E = 2 Rectangular pyramid: 5 faces, 5 vertices, 8 edges 5 + 5 - 8 = 2 Octagonal pyramid 9 + 9 - 16 = 2 |dw:1437543052236:dw|

OpenStudy (mathstudent55):

Rectangular prism 6 + 8 - 12 = 2 |dw:1437543190313:dw|

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