Page 28 - TB_5B
P. 28
2 . Use the shapes to find the measure of the marked angle.

a.
An interior angle of an equilateral triangle
is 60Ø.
An interior angle of a cube is 90Ø.
Therefore, the measure of the marked
angle is 360Ø 60Ø 90Ø 210Ø.

b.

c.

18. The Sum of the Angles in a Polygon 17
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