What is the measure of angle B in the figure below? о 30° О 45° О 60° O90°

asked Oct 25, 2020 226k views

1 vote

What is the measure of angle B in the figure below?
о 30°
О 45°
О 60°
O90°

8.2k points

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6 votes

Answer:

Explanation:

Mohammad Niknam answered Oct 27, 2020

8.4k points

3 votes

Answer:

45°

Explanation:

Using the cosine ratio in the right triangle

cosB =
(adjacent)/(hypotenuse) =
(3)/(3√(2) ) =
(1)/(√(2) ) , hence

B =
cos^(-1) (
(1)/(√(2) ) ) = 45°

Redcalx answered Oct 29, 2020