Question

please solve.....

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Answer 1

Answer:

base angles are 70 and 70

Step-by-step explanation:

so isoceles tringle

so, 2 sides are equal 2x

bertex angle is 40 degree

so, base side = y , sex,

2x= 180-40

2x= 140

x= 70

hope you under stand

Answer 2

Let ∆ ABC be an isosceles triangle.

Vertex Angle A is 40°

Base angles are equal .

Let base angles be 'a' degree.

Angle B & C be ' a ' degrees.

Angle A + Angle B + Angle C = 180° ( Sum of measures of Angels of a triangle is 180°)

40° +a° + a° = 180

40+2a = 180

2a = 180–40 = 140

a = 140/2 = 70°

The base angles are 70° .

Angle B = 70° & Angle C = 70°

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