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What is the measure of Angle R
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1 vote
What is the measure of Angle R

What is the measure of Angle R-example-1
User Bil
by
7.9k points

1 Answer

1 vote

Answer:

D, 25.21°

Explanation:

Law of cosines:


r^2=c^2+t^2-2ct\ cos\angle R

to which, replacing values we get


9=36+49-2(6)(7) cos \angle R\\cos \angle R = \frac {76}{84}\approx 0.90}\\\angle R \approx 25.2087...

User Carlene
by
7.6k points
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