riangle 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 28°.
The flow chart with missing statements and reasons proves that the measure of angle ECB is 62°.
Which statement and reason can be used to fill in the numbered blank spaces?

Question

riangle 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 28°.
The flow chart with missing statements and reasons proves that the measure of angle ECB is 62°.
Which statement and reason can be used to fill in the numbered blank spaces?

anonymous · Answer

A. 1. Corresponding angles are congruent  
2. Triangle Sum Theorem
3. Measure of angle AED is 28°.
B. 1. Base angle theorem 
2. Corresponding angle are congruent
3. Measure of angle AED is 28°.
C. 1. Alternate interior angles are congruent  
2. Base angle theorem
D. 3. Measure of angle AED is 62°.
1. Corresponding angles are congruent
2. Triangle Sum Theorem
3. Measure of angle AED is 62°