Question

G is the incenter of Δ ABC.
m∠A = 55
m∠B = 70
m∠C = 55

What is the m∠ABF?
25

35

27.5

40

Answer 1

incenter is the meeting point of angle-bisectors right ?

Answer 2

yea

Answer 3

and what u knw about an angle-bisector

Answer 4

doesnt it divide the angle in half?

Answer 5

bf is angle bisector so angle abf = 1/2 of angle B

Answer 6

35

Answer 7

remember incenter deals with angle bisectors, and is the centre of a circle in a polygon

Answer 8

thats right ! look at the pix and see whats bisector wud help u figuring out the angle asked

Answer 9

does that help?

Answer 10

i get it now thanks so much!

Answer 11

glad to hear :)