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Explain reasoning with clear mathematical language
Worksheet
Grade Level
Geometry
GEO.15 Explain reasoning with clear mathematical language
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Which explanation best justifies that interior-angle sum of 720 degrees?
A
Every polygon has interior-angle sum 360 degrees.
B
A hexagon can be partitioned into 4 triangles, so the sum is 4 times 180 = 720.
C
The exterior angles sum to 720 degrees.
D
Only triangles can be partitioned into triangles.
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