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Srija Ghosh from Kendrya Vidyalaya Number 2 Colaba, mumbai

Subject :IMO Class : Class 6

Jatin was trying to tessellate regular pentagons. He managed the following figure.

The size of angle ‘a’ is:

A30
B32
C36
D44

how do we do this one?

Ans 1:

suman bharti from ST Joseph's Convent Girls S.S School, Jabalpur

Class : Class 6

Manish Dhoot from Sun city world school, Gurgaon

Class : Class 4

36 because - angle of regulat pentagon = 108 therefore a = 360 - 108-108-108