From the vertex B of the expanded angle ABC, a ray BK was drawn so that the angle ABK = 108 °.
| August 3, 2021 | education
From the vertex B of the expanded angle ABC, a ray BK was drawn so that the angle ABK = 108 °. Beam BD is the bisector of the СBK angle. Calculate the degree measure of the angle DBK.
solution
angle СВK = 180 ° – 108 ° = 72 °
angle КВD = 72: 2 = 36 °
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