Question

PQ and QR are 2 sides of a regular 12 sided polygon PR is a diagonal of the polygon work out the size of angle PQR

Answer 1

Given :

PQ are 2 sides of a regular

By formula , a × n = 360°

so, between P and Q angle is 90°

Then , QR is 12 sided polygon ,so

a = ?

n = 12

a × n = a × 12 = 360°

a = 360 / 12we

a = 30°

Therefore , angle between Q and R is 30°

The diagonal " PR " form a triangle

like,PQR

we Know that ,

angle between PQ and QR are 90° and 30°

angle between ( PQ + QR + PR ) = 180°

BY , PUT THE VALUE OF PQ and QR

90° + 30° + PR = 180°

PR = 180° - 120°

PR = 60°

The size of the a PQR

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Answer 2

Answer:

PQR = 180° - 130°  

PR = 150°

The size of the a PQR