Calculate 4013

In a triangle, one internal angle measures 36 degrees. The second angle is twice the third angle. Calculate unknown angles.

Correct answer:

A =  36
B =  96
C =  48

Step-by-step explanation:


A=36
B = 2·C
A+B+C=180

A = 36
B-2C = 0
A+B+C = 180

Row 3 - Row 1 → Row 3
A = 36
B-2C = 0
B+C = 144

Row 3 - Row 2 → Row 3
A = 36
B-2C = 0
3C = 144


C = 144/3 = 48
B = 0+2C = 0+2 · 48 = 96
A = 36/1 = 36

A = 36
B = 96
C = 48

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