Find the area of this parallelogram. 12 inches
6 in.
7 in.
A. 42 inches
В.
42 square inches
O
C. 84 square inches
D. 72 square inches
O E. 72 inches

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

How do you write a paragraph proof to prove that the corresponding angles shown are congruent