Question

try one last time draw the following triangle after a 90° counterclockwise rotation about the origin. undo

Explanation:

Step1: Recall rotation rule

For a 90 - degree counter - clockwise rotation about the origin, the transformation rule for a point $(x,y)$ is $(-y,x)$.

Step2: Identify triangle vertices

Let's assume the vertices of the original triangle are $(x_1,y_1)$, $(x_2,y_2)$, $(x_3,y_3)$.

Step3: Apply rotation rule

The new vertices after 90 - degree counter - clockwise rotation will be $(-y_1,x_1)$, $(-y_2,x_2)$, $(-y_3,x_3)$.

Step4: Plot new triangle

Use the new vertices to draw the rotated triangle on the coordinate plane.

Answer:

Plot the triangle with vertices obtained by applying the 90 - degree counter - clockwise rotation rule $(-y,x)$ to the original triangle's vertices.