The angle between the lateral sides of an isosceles triangle is 80 degrees. Find the angle at the base
| December 3, 2020 | education
sum of angles in a triangle 180 °
let the angle at the base x. make an equation
2x + 80 = 180 (2x because at the base there are two equal angles, since this is an isosceles triangle)
2x = 100
x = 50
answer: 50 °
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