## Tati_Lee 3 years ago 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 28°.

1. Tati_Lee

2. Tati_Lee

The flow chart with missing statements and reasons proves that the measure of angle ECB is 62°.

3. Tati_Lee

Which statement and reason can be used to fill in the numbered blank spaces? 1. Base angle theorem 2. Corresponding angle are congruent 3. Measure of angle AED is 28°. 1. Alternate interior angles are congruent 2. Base angle theorem 3. Measure of angle AED is 62°. 1. Corresponding angles are congruent 2. Triangle Sum Theorem 3. Measure of angle AED is 28°. 1. Corresponding angles are congruent 2. Triangle Sum Theorem 3. Measure of angle AED is 62°.

4. Directrix

|dw:1348275143603:dw| What is the theorem that says the angles are congruent if the lines are parallel?

5. Directrix

Hey, I don't think this picture goes with this proof. D is a right angle in the diagram but not on the flow chart. Please check diagram and chart to see if they go together.

6. Tati_Lee

it goes together

7. Directrix

Okay, we're back to the question I asked. State the theorem that supports how we know these two angles are congruent if the lines are parallel.

8. Tati_Lee

ahhhh! idk

9. Directrix

Read page one at this link and see if you can figure out which theorem it is. http://www.nexuslearning.net/books/ml-geometry/Chapter3/ML%20Geometry%203-4%20Proving%20Lines%20are%20Parallel.pdf