Find the degree measure of the angle formed by the bisectors of two adjacent angles, one of which is 70º?

1. Let’s define what the degree measure of another angle is equal to.

180 – 70 = 110 °.

2. The bisector drawn from the vertex of the angle divides this angle in half. This means that the new ones are 1/2 of the former, that is, one 70/2 = 35 °, the other 110/2 = 55 °. Hence, the bisectors formed an angle of 35 + 55 = 90 °.

Answer: 90 °.



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