There are many ways of describing the rule. Perhaps the simplest is to premultiply the coordinates of any point by the matrix:( 0 -1 )
( 1 0 )
Chat with our AI personalities
{1 0} {0 -1}
(-1, -4) rotated 90 degrees anticlockwise
Rotating a triangle 90 degrees counterclockwise would involve taking an upright triangle and laying is toward the left on its back. Changing position through rotation can cause a better visualization for some problem solving.
90 degreesThere are 90 degrees in a right angle.There are 90 degrees in a right angle
It is an anticlockwise rotation through 90 degrees.