∆STU has vertices S(2, –1), T(5, 1) and U(3, 3). Determine the coordinates of the figure rotated 90° counterclockwise about the origin.

answer4 to the second power is 16

and 4 to the third power is 64,

add 8+12 to get a simplified answer of 12r-20

-1/4 > -1 2/3. -1/4 is greater than -1 2/3 because it is closer to 0 on the number line.

arc length = radius * x ( in radians)

6 * pi = 18 * x

divide by 18 on each side

6 pi / 18 = x

pi/3 = x

the angle is pi / 3 radians

or   60 degrees