Question

∠ AED is formed inside a circle by two intersecting chords. If minor arc BD = 70° and arc CA = 170° , what is the measure of ∠ AEC?

A)120
B)240
C)70
D)100

Answer 1

So

• mCA=170°

And

• mBD=70°

Now

• 180-170=10°

From mBD

• 70-10=60°

Now

m<AEC

• 70+50=120°

Option A