Question

Triangle ABC has vertices A(−2,10) , B(4,8) , and C(2,4) .

What are the coordinates of A′B′C′ after triangle ABC has undergone the following transformation?


rotation 90° clockwise about the origin


Enter your answers, as ordered pairs (x, y) , in the boxes.

A′=

B′=

C′=

Answer 1

A' =(2,4)

B'=(8,2)

C′=(6,-2)

Answer 2

A'=(10,2)

B'=(8,-4)

C'=(4,-2)

To rotate a point 90° clockwise about the origin,

The new coordinates become (y,-x)

So the first one was A(-2,10)

x=-2 & y=10

The new coordinates become A'(y,-x)

So y=10 and -x=-(-2)=2

A'(10,2)