Discussion
What is the number of sides of a regular polygon whose each interior angle is 135°?
Answer: B
If the interior angle is 135°, the exterior angle is 180° - 135° = 45°.
The number of sides 'n' of a regular polygon is given by n = 360° / (exterior angle).
n = 360° / 45° = 8.
The polygon is an octagon.
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