Question

In figure,find the measurement of <BCD​

Answer 1

Answer:

it is a exterior angle

and exterior angles = sum of interior angles

100+30= BCD

130 = angle

Answer 2

Answer

In a triangle, the exterior angle is always equal to the sum of the interior opposite angle. This property is known as exterior angle property.

so,

BCD = 100+30

BCD = 130°

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