Given x + y=10
Ifx= -21, what is y?

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

The reflexive property of congruence lets you say that ∠pqr ≅

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