Question

please reply
It is
argent​

Answer 1

In a

two sides are equal means its an isosceles triangle

it also have two equal angles

take the equal angles as = x

x + x + 40 = 180

2x + 40 = 180

2x = 180-40

2x = 140

x= 140/2

x = 70

in second question

exterior angle of a triangle = sum of opposite angles

100 = 40 + x

60= x

Answer 2

Answer:

In ∆PQR,

RP = QP

☞ Angles oppsite to equal sides are equal

Angle Q = Angle R

x = Angle R. .....1

Angle P + Angle Q + Angle R = 180

40+x+x = 180. by 1

40 + 2x = 180

x = 70

In ∆ABC,

BC is a straight line, i.e

100 + Angle C = 180

C = 80

→ 80 + 40 + x = 180

→ 120 + x = 180

→ x = 60

Step-by-step explanation:

Hope it helps you

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