The Sum of the Measures of Two Angles of a Triangle

question 82

Multiple Choice

The sum of the measures of two angles of a triangle is twice the measure of the third angle. The measure of the second angle is 9^∘ more than the measure of the third angle. Find the measures of the three angles.

• A)The first angle is 60^∘ , the second angle is 51^∘ , and the third angle is 69^∘ .
• B)The first angle is 69^∘, the second angle is 60^∘ , and the third angle is 51^∘.
• C)The first angle is 51^∘ , the second angle is 60^∘ , and the third angle is \(69 ^ { \circ }\) .
• D)The first angle is \(510\) , the second angle is \(69 ^ { \circ }\) , and the third angle is \(60 ^ { \circ }\) .
• E)The first angle is \(69 ^ { \circ }\) , the second angle is \(510\) , and the third angle is \(60 ^ { \circ }\) .

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