Question

Secant lines AE and BF intersect at point D inside point C. What is the measure of angle FDA?

Answer 1

If two chords intersect within a circle an angle formed is equal to one-half the sum of the arcs it intersects and the arc its vertical angle intersects.

Angle FDE = (1/2) [ 30 + 60 ] = 45.

Its supplement, Angle FDA = 180 - 45 = 135.

Answer 2

aaahh i see

Answer 3

thank you!

Answer 4

Glad to help.