Question

If the vertex angle of an isosceles triangle is 40 degrees then the measure of other two angles will be?​

Answer 1

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Answer 2

Answer:

This sounds like yet another middle school homework problem. The answer is easy enough but you need the explanation or you’ve learned nothing. Learn to break it down into steps.

All triangles have 180 degrees internally.

Isosceles triangles have two identical length sides.

Since two sides of an isosceles are identical, the two angles separated by the base are equal.

Back to #1, 180 degrees are in a triangle. Subtract the vertex angle of 40 degrees from the 180 degrees. That leaves 140 degrees.

Back to #3, the remaining two angles are identical. Divide that 140 remaining degrees by 2 for 70 degrees each.

Pay attention in class and read your textbook, it’s not rocket science!