∠abd is formed by a tangent and a secant intersecting outside of a circle. if minor arc ac = 72° and minor arc cd = 132°, what is the measure of ∠abd?

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°