Question

please answer it urgently
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Answer 1

Answer:

Step-by-step explanation:

OA = OB (Radii)

Angle OBA = angle OAB = 50°

InΔ OAB,

Angle O+angle A+angleB = 180° (ASP)

Angle BOA = 180-50-50 = 80°

BOA+BOD = 180° (Linear pair)

BOD = 180-80 = 100°

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Answer 2

As OA = ON (RADII)

THEREFORE ANGLE OAB= ANGLE OBA = 50 (ANGLES OPPOSITE TO EQUAL SIDES ARE EQUAL)

THEREFORE ANGLE BOD =100

(EXTERIOR ANGLE PROPERTY)

(THAT SUM OF THE TWO ANGLES OF A TRIANGLE IS EQUAL TO THE EXTERIOR ANGLE OF THE THIRD ANGLE OF THE TRIANGLE )