Answer is 80
Sum of all side of triangle is 180
ABC is 100
100+80=180
Answer:
10°
Step-by-step explanation:
By angle subtended by same chord theorem,
exterior angle AOC = 2×ABC
= 200°
so angle AOC = 360-200
=160°
As OA and OC are radii of the circle they both are equal
So, angle OAC = angle OCA
( angles opposite to equal sides are equal)
ie, AOC + 2x = 180° (angle sum prop.)
x is OAC or OCA
2x = 180-160
x = 20÷2
x = 10
ie, angle OAC = 10°
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Answers & Comments
Answer is 80
Sum of all side of triangle is 180
ABC is 100
100+80=180
Verified answer
Answer:
10°
Step-by-step explanation:
By angle subtended by same chord theorem,
exterior angle AOC = 2×ABC
= 200°
so angle AOC = 360-200
=160°
As OA and OC are radii of the circle they both are equal
So, angle OAC = angle OCA
( angles opposite to equal sides are equal)
ie, AOC + 2x = 180° (angle sum prop.)
x is OAC or OCA
2x = 180-160
x = 20÷2
x = 10
ie, angle OAC = 10°