if a b is the radius of the circle find the value of angle A and B if O is the centre of the circle
Answers
Answer:
Step-by-step explanation:
angle AOB+angleAOC=180(sum of all angle in a stright line is 180)
angleAOC=180–60
angle AOC=120
in this question angle BAC= 90 digree because the angle in circamference of half circle should be 90 digree.
sides AO,OB&OC are equal because these are the radious of circle.
angle OAB&OBA are equal(OB=OA),now in tringle AOB
let angle ABO=x=angle ABC,
angle ABO=angle BAO
x+x+angleAOB=180 (sum all angle in tringle is 180)
2x=180–60
x=60 digree=angle ABC
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