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BaLLatris [955]
3 years ago
5

What is the measure of angle ABC? • 36° • 43° • 72° • 144°

Mathematics
2 answers:
RideAnS [48]3 years ago
7 0

Given that the measure of ∠ADC = (7x + 2)° and arc AC = (8x - 8)°

We need to determine the measure of ∠ABC

<u>The value of x:</u>

The measure of ∠ADC can be determined using the formula,

m\angle ADC=m \widehat{AC}

Substituting the values, we get;

7x+2=8x-8

-x+2=-8

     -x=-10

       x=10

Thus, the value of x is 10.

<u>The measure of ∠ADC:</u>

Substituting the value x = 10 in the measure of ∠ADC = (7x + 2)°

We have;

\angle ADC=(7(10)+2)^{\circ}

\angle ADC=(70+2)^{\circ}

\angle ADC=72^{\circ}

Thus, the measure of ∠ADC is 72°

<u>The measure of ∠ABC:</u>

The measure of ∠ABC can be determined using the central angle theorem.

Thus, we have;

\angle ADC=2\angle ABC

     72^{\circ}=2\angle ABC

     36^{\circ}=\angle ABC

Thus, the measure of ∠ABC is 36°

Hence, Option A is the correct answer.

Alja [10]3 years ago
3 0

Answer:

A

Step-by-step explanation: I just took the test

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