D
250
>>
30º
E
B
Help Video for Questions 1 through 7.
Need help identifying the angles? Watch this help video.
1. What do we know about alternate interior angles of parallel lines? Equal
2. What do we know about the measure of the alternate interior angles EAB and AED?
Equal-
3. Angle BEA and angle EAD are also alternate interior angles. What is the measure of
angle EAD?
The measure of angle EAD is 30°
4. What is the measure of angle DAB? Justify your answer.
The measure of angle DAB is 55°. This is because 30° + 25* = 55*
5. What do we know about the measure of the opposite angles DAB and DEB? Equal
6. What do we know about the measure of the adjacent angles
Equal-
7. What is the measure of angle ADE?
The measure of angle ADE is 55°.
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