Simplify PQ. [?]2 + (-c+ [])2
R
(0, a)
S (b, c)
Die
Q (0, -a)
P (b, -c)
Enter the value
that belongs in the
green box.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: