Question

please answer me urgent!​

Answer 1

(ii)

let the angle A be76

B and C are x

Angle A =Angle B (prop.of an isoceles triangle i.e base angles are same)

So,

A +B+C =180

76+x+x=180

2x=180-76=104

so,

angle B is 52

and C is 52

Answer 2

(1) angle ACD= 120
angle ACB = 180 -120 =60
angle ABC + BCA + BAC =180
x + 60 + 50 =180
x + 110 =180
x= 180-110
x=70

(2)AB=AC

angle ABC = angle ACB
(because angle opposite to the equal sides are equal)
angle sums property of a triangle is 180
angle ABC + ACB + BAC = 180
ABC +ABC + 76= 180
2ABC = 180 - 76
2ABC=104
ABC =104/2
angle ABC = 52
ABC = ACB =52