The measure of ∠B is 52°.
The correct answer is option (B) 52°
What is right triangle?
"It is a triangle whose one of the angle is 90°"
From given diagram,
For triangle ABC, ∠A = 38°, ∠C = 90°
We need to find ∠B
We know,
The sum of all the angles of a triangle is 180°.
⇒ ∠A + ∠B + ∠C = 180°
⇒ 38° + ∠B + 90° = 180°
⇒ 128° + ∠B = 180°
⇒ 128° + ∠B - 128° = 180° - 128°
⇒ ∠B = 52°
The correct answer is option (B) 52°
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