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Mathematics

Grade-8

Easy

Question

Find the measures of unknown angles.

40^o
60^o
50^o
80^o

hint Hint:

Two sides of the triangle are equal.
We know the angles opposite to equal sides are equal.
We know that the sum of interior angles of a triangle is 180.

The correct answer is: 50^o

Given: Two sides of the triangle are equal.
We know the angles opposite to equal sides are equal.
So, angle x = angle y
We know that the sum of interior angles of a triangle is 180.
angle x + angle y + 80 = 180
2 angle x = 100 degree
angle x = 100/2
angle x =50
So, the measure of angle x and angle y is 50.

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