In triangle ABC, angle B is obtuse. Continuation of heights AA1.BB1.CC1 intersect at point
| September 29, 2021 | education
In triangle ABC, angle B is obtuse. Continuation of heights AA1.BB1.CC1 intersect at point o angle AOC = 60 degrees, find angle ABC
In a convex quadrilateral BC1OA1, the sum of the interior angles is 360.
Angle OC1B = OA1B = 90, angle A1OC1 = 60, then angle A1BC1 = 360 – 60 – 90 – 90 = 120.
Angle ABC = A1BC1 = 120 as vertical angles.
Answer: Angle ABC is 120.
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