9. In ∆ABC, ∠= 80°, CD bisect ∠ and CD ⊥ AB. Find the measure of ∠. Please tell fast and get brainlest ans
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Step-by-step explanation:
In △ABC,∠BAD+∠ADB+∠DBA=180°
by angle sum property of a triangle.
50° +90°+∠DBA=180°
⇒∠DBA=180° −140°
=40°
∴∠B=40°
Answered by
1
Correct answer:-
In △ABC,∠BAD+∠ADB+∠DBA=180° by angle sum property of a triangle.
50° +90° +∠DBA=180°
⇒∠DBA=180° −140° =40°
∴ ∠B = 40° [Ans].
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