Question

guys solve this question ​

Answer 1

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TRIANGLE ABC = TRIANGLE A'B'C'

AB = A'B'

ANGLE ABC = ANGLE A'B'C'

BC = B'C'

SO ∆ABC IS CONGRUENT WITH ∆A'B'C'

BY SAS CRITERIA

AND BY CPCT ;

angle BAC = angle B'A'C'

3x = 2x + 20

3x - 2x = 20

x = 20

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Answer 2

Answer:

As in Congruency The angles of triangles and the sides of the triangle to the another one is equal So,

Angle A = Angle A'

3x= 2x +20°

So your X will be

x=20 degree.

Angle B is Also equal To Angle B'

60°.

Similarly Angle C will also equal to Angle C'

It will come By Angle Sum property of a triangle:-

Angle A + Angle B + Angle C = 180 degree

20 + 60 + Angle C =180

Angle C will be = 180 - 80

Angle C will be your = 100 degree.

thank you

I hope this would help you.