9
practice testMultiple Choice

Practice Test

Question 9 • Mathematics II

Triangle ABC has the angle measures shown. m angle cap A is equal to 2 x degrees m angle cap b is equal to 5 x degrees m angle cap c is equal to 11 x degrees Which statement is true about the angles?

Answer
A
m angle cap A plus m angle cap c is equal to 120 degrees
B
angle cap A and angle cap b are complementary
C
m angle cap b is equal to 60 degrees
D
m angle cap A is equal to 20 degrees

Explanation

The angles of a triangle add to 180 degrees, so 2x + 5x + 11x = 180. This gives 18x = 180 and x = 10, so angle A measures 2(10) = 20 degrees. Therefore, the true statement is that m angle A is equal to 20 degrees.

AI-written and checked against the verified answer.

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