Regularly Right

Geometry Level 2

The sides of a pentagon, hexagon and another regular polygon that are inscribed in congruent circles, form a right triangle .

How many sides does the last regular polygon have?

8 10 12 15

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Chung Kevin by Chung Kevin , 46, Australia

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1 solution

Ahmad Saad
Jun 26, 2016

3 Helpful 0 Interesting 0 Brilliant 0 Confused

A/c to figure each interior angle of pink polygon is 120 and at point where right angled form sum of all angle will be 360 and then each angle of unknown side angle will be 150 then using the formula each angle =n-2/n *180 we will find 12 number of side.

shyam upadhyay - 4 years, 10 months ago

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