In triangle ABC, angle A = 90, angle C is 70, AD is bisector. find the corners of the triangle BAD.
| August 7, 2021 | education
The angles of a triangle add up to 180 °.
In the triangle ABC we find the angle B.
180 ° – (90 ° + 70 °) = 180 ° – 160 ° = 20 °
The bisector of angle A divides this angle into two equal angles of 45 °.
In triangle BAD, angle B and angle A are known. Find angle D.
180 ° – (45 ° + 20 °) = 180 ° – 65 ° = 115 °.
Answer: the angles of the triangle BAD are A = 45 °, B = 20 °, D = 115 °.
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