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3 years ago

14

Use the diagram below to answer the question.

1 answer:

prohojiy [21]3 years ago

3 0

Line BD is perpendicular to line AC. both angles ADB and CDB are right angles.

4x+10=90
subtract 10 from both sides

4x=80
divide both sides by 4 to isolate x

x=20

plug in 20 for x in the equation (x+11) to find the measure of angle c

20+11=31°

the measure if angle c is 30°

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