Triangle PQR has the following coordinates: P (-9,-12) Q(-6, -13) R(-7, -4)

Where is Q' after a rotation 90° clockwise?

Please write your answer as a coordinate: (x, y)

The coordinates of Q’ are (-13,6)

Step-by-step explanation:

Here, we want to get the coordinates of the point Q’ obtained by rotating point Q at a degree of 90 clockwisely

Generally, we have the formula for the rotation as follows;

(x,y) will then (y,-x)

Thus,

(-6,-13) will become (-13, -(-6)) = (-13,6)

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

a

step-by-step explanation: