Question #2d209

1 Answer
sankarankalyanam
Jan 8, 2018

#/_Y = color (blue)(132^0)#

Explanation:

ABC is an equilateral triangle.
Hence #/_(ABC) = 60^0#

This polygon is 5 sided pentagon.
Hence exterior #/_(TPB) = 360 / 5 = 72^0#

Exterior angle = sum of the interior opposite angles of a triangle.

Hence, #/_Y = /_(TOB) + /_(ABC) = 72 + 60 = 132^0#

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