Geometryeasy · Past Paper
In an isosceles triangle, if the vertical angle is 100 degrees, what are the base angles?
A40 degrees each
B80 degrees each
C50 degrees each
D100 degrees each
✓ Correct Answer: A — 40 degrees each
Base angles are equal. (180 - 100) / 2 = 80 / 2 = 40 degrees each.
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