Triangle PQR has vertices at P(–3, –2), Q(5, –6), and R(–1, 4). Triangle PQR will be rotated 90° counterclockwise about the origin. What will be the coordinates of Q′? A.
(–6, –5)

B.
(–5, –6)

C.
(5, 6)

D.
(6, 5)

c

step-by-step explanation:

i think because what else can be a sample of every member

any options?

step-by-step explanation:

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.