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kkurt [141]
3 years ago
7

Find the measure of angle ABC. A. 124 B. 97 C. 56 D. 51

Mathematics
2 answers:
Airida [17]3 years ago
6 0

Answer: Last Option

Step-by-step explanation:

By definition the sum of the internal angles of a triangle must always be equal to 180 °.

This means that:

32 + (2x-15) + (x-5)=180

Now we solve the equation for the variable x

32 + 2x-15 + x-5=180

2x+x +32-15-5=180

3x +32-20=180

3x +12=180

We subtract 12 in both barks of the equation

3x +12-12=180-12

3x=168

Divide by 3 on both sides of the equation

\frac{3}{3}x=\frac{168}{3}

x=\frac{168}{3}

x=56

Finally the measure of angle ABC is: (56-5)° = 51°

Evgen [1.6K]3 years ago
5 0
The measure of angle ABC is 56 .
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