Triangle abc is a right triangle. point d is the midpoint of side ab and point e is the midpoint of side ac. the measure of angle ade is 36°.
the following flowchart with missing statements and reasons proves that the measure of angle ecb is 54°:
which statement and reason can be used to fill in the numbered blank spaces?
a. 1.measure of angle aed is 36°
2.base angle theorem
3.corresponding angles are congruent
b. 1.measure of angle aed is 54°
2.base angle theorem
3.alternate interior angles are congruent
c. 1.measure of angle aed is 54°
2.triangle sum theorem
3.alternate interior angles are congruent
d. 1.measure of angle aed is 54°
2.triangle sum theorem
3.corresponding angle are congruent