In an isosceles triangle, the base angles are equal. The vertex angle is 40°. What are the base angles of the triangle? (Remember, the sum of three angles of a triangle is 180°).
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Answered by
22
Step-by-step explanation:
let the base angles be x...
In triangle ABC
40 + x + x = 180
40 + 2x. = 180
2x = 140
x = 70
base angles = x = 70.....
Hope it is correct
Answered by
10
Step-by-step explanation:
As the base angles are equal
Let each of these base angles be x°
Vertex angle = 40°
We know that,
Sum of three angles of a triangle = 180°
x°+x°+40° = 180°
x +x+40 = 180
2x +40 = 180
2x = 180-40
2x = 140
x = 140/2
x = 70
The base angles are 70° each.
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