If δabc is congruent to δdef, which statement must be true?

a.
line bc is congruent to line de
b.
∠a is congruent to ∠d
c.
∠bac is congruent to ∠def
d.
line ab is congruent to line ef

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5