Question

In given figure TA TB are tangents to a circle with centre O If (9question)

Answer 1

Ans: TA and TB are 2 tangents means they are equal.(TANGENTS FROM AN EXTERNAL POINT ARE EQUAL)

Then <A=<B

Then a+b++c = 180°

Then 2b=180-80=100°

Then b=50°

HENCE ,ABT= 50°

Answer 2

Answer:

50

Step-by-step explanation:

draw a perpendicular bisector to OT

from triangle OBT

angle t =40

angle O=90

Angle B=?

by angle sum property

40+90+B=180

B=180-130

B=50

Angle ABT=50