Question

o is the centre of the circle. if AB and AC are tangent to the circle and angle BOC=110.find the measure of angle OAB​

Answer 1

Step-by-step explanation:

we are given :

angle BOC = 110

AB and AC are tangents to the circle

To find : angle OAB

SOLUTION:

As AB is tangent to the circle

thus angle ABO = 90** --------( 1 )

similarly AC is tangent to the circle

thus angle ACO = 90** ---------( 2 )

IN QUADRILATERAL ABOC

angle ABO + angle BOC +

angle OAB+ angle ACO =>360

90(from 1 ) + 110(given)

+ angle OAB + 90(from 2) => 360

290 + angle OAB => 360

angle OAB => 360-290

angle OAB => 70

(**RADIUS IS PERPENDICULAR TO TANGENT)

HOPE THIS HELPS YOU

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Answer 2

Step-by-step explanation:

that's a tough one