Given the two angles alpha_1 and alpha_2 in which a vertex angle of a triangle is split by the related median m, find the remaining angles of the triangle beta and gamma.

babuliaam

babuliaam

Answered question

2022-09-25

Solve a triangle given the two angles in which a median split a vertex angle
Given the two angles α 1 and α 2 in which a vertex angle of a triangle is split by the related median m, find the remaining angles of the triangle β and γ.

Answer & Explanation

ti1k1le2l

ti1k1le2l

Beginner2022-09-26Added 9 answers

Step 1
By applying the sine law for triangles ABM and AMC, you can get that s i n α 1 s i n α 2 = s i n β s i n γ holds true.
Step 2
Since problem statement indicates the given angles α 1 and α 2, using triangle's angles summation property, one would find γ = 180 α 1 α 2 β with known ratio s i n β s i n ( α 1 + α 2 + β ) . I guess it would be obvious afterwards to evaluate the desired angle β.

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