Question

In quadrilateral ABCD: AD=BC, ∠DAC=50°, ∠DCA=65°, ∠ACB=70°. Find the measure of ∠ABC, in degrees.

Answer 1

M < abc = 55 Degrees

Explanation:

Since you can use the substitute angle of the triangle, this enables you to simplify the equation, knowing that all triangles angles add up to 180 degrees.