Triangle 42

Triangle BCA. Angles A=119° B=(3y+14) C=4y. What is measure of triangle BCA=?

Correct result:

C =  26.8571 °

Solution:


A = 119
B= 3y+14
C = 4y
A+B+C=180

A = 119
B= 3•y+14
C = 4•y
A+B+C=180

A = 119
B-3y = 14
C-4y = 0
A+B+C = 180

A = 119
B = 239/7 ≈ 34.142857
C = 188/7 ≈ 26.857143
y = 47/7 ≈ 6.714286

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