Question

find the size of unknown angle with reason​

Answer 1

Answer:

x=60°

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Answer 2

Answer:

APB = 60°

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Step-by-step explanation:

OA OB are radius

OA OB are radiusOAB+OBA+BOA=180

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30°

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60BOA = 120°

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60BOA = 120°BOA=2APB(ANGLE SUBTENDED BY AN ARC AT CENTRE IS DOUBLE THE ANGLE SUBTENDED ON ANY POINT ON THE CIRCLE)

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60BOA = 120°BOA=2APB(ANGLE SUBTENDED BY AN ARC AT CENTRE IS DOUBLE THE ANGLE SUBTENDED ON ANY POINT ON THE CIRCLE)120°=2APB

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60BOA = 120°BOA=2APB(ANGLE SUBTENDED BY AN ARC AT CENTRE IS DOUBLE THE ANGLE SUBTENDED ON ANY POINT ON THE CIRCLE)120°=2APBAPB=120÷2

OA OB are radiusOAB+OBA+BOA=180OAB=OBA (CHORD IS AT EQUAL DISTANCE FROM CENTRE)=> OAB=OBA=30° =>30+30+BOA= 180°=>60+BOA = 180°BOA= 180-60BOA = 120°BOA=2APB(ANGLE SUBTENDED BY AN ARC AT CENTRE IS DOUBLE THE ANGLE SUBTENDED ON ANY POINT ON THE CIRCLE)120°=2APBAPB=120÷2APB = 60°