Find m angle d for m angle b = 65
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2 answers:
Answer:
Denote O as center of circle, draw OA, OC.
As property of tangent line from outside of circle (angle OAD = angle OCD = 90 deg):
=> AOC + D = 180
Moreover, angle AOC = 2 x angle B = 2 x 65 = 130
=> D = 180 - 130 = 50 deg
Hope this helps!
:)
Answer:
50°
Step-by-step explanation:
Angle of arc AC = 2 × 65 = 130
(Angle at the centre is twice the angle on the circumference)
Tital angle of the quadrilateral with one vertex at the centre = 360
m(D) + 90 + 90 + 130 = 360
m(D) = 360 - 310 = 50°
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