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