The outer angle at the apex of an isosceles triangle is 130 degrees. Calculate the interior angles of the triangle.
| February 18, 2021 | education
To begin with, let’s determine the inner angle at the apex of an isosceles triangle.
As a result of the calculation, we will have an internal angle at the apex of an isosceles triangle equal to 180 – 130 = 50 °.
Knowing that an isosceles triangle has equal internal angles at its base, we find the value of each of them.
As a result of calculations, we obtain the value of the internal angle at the base of an isosceles triangle, equal to (180 – 50) / 2 = 130/2 = 65 °.
Answer: The interior angles of an isosceles triangle are 65 °, 65 ° and 50 °.
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