Question

R
Q3. A polygon A1 A2 A3 ... A15 of 15 sides is inscribed in a circle, that is all its vertices
lie on circumference of the same circle. All the 15 sides are equal in length. If M is the
center of the circle then find the measure of angleMA1 A2.​

Answer 1

Step-by-step explanation:

1st vertex nC1 way 2 and n can not be taken. Remaining vertices are ⇒ number of gaps (n – 6)

out of which 4 can be selected in n – 6C4 ways

Hence required number of ways which is satisfied by n = 12

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