In triangle ABC, angle C = 30 °, and the outside angle at apex A is 120 °. Find the unknown angles of the triangle.
| December 2, 2020 | education
The BAC angle will be 180-120 = 60 °
Angle C = 30 °
And the sum of the angles of a triangle is 180 °
To find the angle ABC (That is, the angle B in the triangle ABC), you need to subtract all known angles from the sum of the angles of the triangle
180-60-30 = 90 °
Answer: Angle ABC = 90 °, angle BAC = 60 °
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