Question

A triangle ABC with vertices A (1, 5), B (5, 2), and C (-1, 2) is rotated 90º . What are the coordinates of C'?

Answer 1

The answer is (-2,-1), by the formula:
R90 (x,y)= (-y,x)

Answer 2

The required coordinate of the c is (5,8). When triangle rotated by 90º clockwise about (5,2).

A triangle ABC with vertices A (1, 5), B (5, 2), and C (-1, 2) is rotated 90º.
Coordinates of c to be determine.

What are coordinates?

Coordinates are relative values of x and y or graph.

Here, Question seems to be incomplete. points of rotation is missing, so assumed that the triangle has clockwise rotation about point (5,2).
After rotation the new coordinate of C  is (5, 8). Cause the base would be vertical so x coordinate will be same and y coordinate increase by 6.

Thus, the required coordinate of the c is (5,8). When triangle rotated by 90º clockwise about (5,2).

Learn more about coordinates here:
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