Question

Under what composition of transformations does triangle ABC map onto triangle A"B"C" A. Rotation of 180 degrees, then Reflection over x- axis.B. Reflection over X- axis, then Rotation of 90° CCW. C. Rotation of 90° CW. then Reflect over the y-axisD. Reflection over y- axis, then Rotation of 270 Degrees CW

Answer 1

B. Reflection over X- axis, then Rotation of 90° CCW.

A reflection over the x-axis makes (x,y) = (x,-y)

for example for point A= (1,8), A' = (1,-8)

Then a rotation of 90° clockwise makes any point (x,y)into (-y,x)

Again for A' = (1,-8)

A'' = (8,1)