ΔDEF rotates 90° clockwise about point A to create ΔD 'E 'F. Therefore, which equation must be true?
A. m∠DEF = m∠D 'F 'E '
B. m∠D 'E 'A ' = m∠DAE
C. m∠EAE ' = m∠FAF '
D. m∠DAE m∠E 'A-F '

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal

A) find the derivative of the inverse to f(x) = 3x + sint at x 6. b) (cale) find the derivative of the inverse to f(x)+3sin at x 6. if x +2y -34, ind he behaviar of the cure at 4,.3), c) a. increasing, concave up d. decreasing, concave down b. increasing, concave down e. decreasing, inflection point c. decreasing, concave up