Question

6. In an isosceles triangle the base angles are equal, the angle ar vertex is 30. Find the base angles​

Answer 1

Let the base angles be

′

x

′

Therefore,

x+x+40

∘

=180

∘

[Given]

2x=180

∘

−40

∘

2x=140

∘

x=70

∘

Hence,

The base angles of the triangle are 70

∘

,70

∘

.

Answer 2

Answer:

Step-by-step explanation:

let the triangle be TRIANGLE ABC ( i was not having triangle sign so ) and

angle B be x. then,

angle B = angle C  = x ,  angle A = 30

now,

angle A + angle B + angle C = 180

30 + x + x = 180

30 + 2x = 180

2x = 180 - 30

2x = 150

x = 75

hence,

angle B = angle C = 75