Question

find the X in following figure​

Answer 1

x = 40

Step-by-step explanation:

Since it is an isosceles triangle

It sides and base angles are equal

= 100 + x + x = 180 ( angle sum property)

= 100+2x = 180

= 2x= 180-100

= 2x=80

$= x = \frac{ 80}{2}$

= x = 40

Answer 2

Answer:

x = 40°

Step-by-step explanation:

In this figure...the triangle is an isosceles triangle. And in an isosceles triangle,  two of its angles are of equal measure.

So, ∠R = 'x'

∠P + ∠Q + ∠R = 180°

100° + x + x = 180°

100° + 2x = 180°

2x = 180° - 100°

2x = 80°

x = 80° / 2

x = 40°

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