Answer:
<DEF = 107
Step-by-step explanation:
The way to best solve this problem is by starting with angle F. Remember that all angles in a straight line must add up to 180. So by subtracting 135 from 180 we get 45 for angle F.
180 - 135 = 45
After that, we can figure out the measure of <DEF. All the angles of a triangle must add up to 180. So:
180 - 28 - 45 = 107
Making the answer 107 for the measure of <DEF
Answer:
90
Step-by-step explanation:
formula = 1/3 x base area x height
1/3 x (9 x 2) x 15 = 90
The answer to the question is 23
Help you on what?i do not see anything
If BE is perpendicular to DF,that means that angle DEB is 90 degrees. Since we know that DEA is 71 degrees, subtract 90 to 71 to find the value for angle AEB. 90-71 equals 19 so angle AEBis 19 degrees.
