Answer:
Angle BEC = 108°
Step-by-step explanation:
Vertical angles formed when two straight lines intersect are always congruent to each other. That is, the vertical opposite angles formed are of the same measure.
Angle AED = 108°
Angle AED and angle BEC are vertical opposite angles form by intersecting lines, therefore, angle AED = angle BEC.
Angle BEC = 108°
Answer:
40
Step-by-step explanation:
5√64 = 5 x 8 = 40
I think it is 9 - x because 81-x^2/9-x = 9-x