If in an isosceles triangle the angle at the base is 55 degrees, then the angle opposite to the base is 70 degrees. Why?
| July 25, 2021 | education
In the triangle ABC <A = <C = 55 °, <B = 180 ° – (<A + <C) = 180 ° – (55 ° + 55 °) = 180 ° – 110 ° = 70 °. Proven.
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