Question

in an isosceles triangle, the base angle are equal ,the vertex angle is 40degre .what are the base angles of the triangle.
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Answer 1

Answer

The base angles of the triangle are 40°

Step-step explanation

As the base angles of any triangles are equal.

So let the base angles be x

∴ x +x + 40° = 180° ( sum of all angles of a triangle= 180°)

∴   2x + 40° = 180°

∴             2x = 180 -40

∴             2x = 140

∴               x = 140/2

∴               x = 70

∴The base angles of the triangle are 40°