What is the equation for a 90 degree rotation?

What is the equation for a 90 degree rotation?

90 Degree Rotation When rotating a point 90 degrees counterclockwise about the origin our point A(x,y) becomes A'(-y,x). In other words, switch x and y and make y negative.

What is the rotation rule?

Predicting Rotations Rotate the point (5, 8) about the origin 270° clockwise. The rule for rotating an object 270° clockwise about the origin is to take the opposite value of the x coordinate and then switch it with the y coordinate.

How long does it take for the Earth to rotate?

23 hours, 56 minutes and 4.0916 seconds

How do you rotate a point 30 degrees?

Rotate the point by 30°. You do this by adding 36.87°+30°, to get a rotated angle of 66.87°.

How do you reflect points?

When you reflect a point across the line y = x, the x-coordinate and y-coordinate change places. If you reflect over the line y = -x, the x-coordinate and y-coordinate change places and are negated (the signs are changed). the line y = x is the point (y, x). the line y = -x is the point (-y, -x).

How do you reflect a shape?

Reflecting a shape simply means to flip it over a mirror line. Each point in the shape is moved to the other side of the mirror line but remains the same distance away from the line. The reflected image will now be facing in the opposite direction to the original object.

How do you fully describe a reflection?

A reflection is a transformation that acts like a mirror: It swaps all pairs of points that are on exactly opposite sides of the line of reflection. The line of reflection can be defined by an equation or by two points it passes through.

What does a rotation look like?

A rotation is a type of transformation which is a turn. A figure can be turned clockwise or counterclockwise on the coordinate plane. In both transformations the size and shape of the figure stays exactly the same. A rotation is a transformation that turns the figure in either a clockwise or counterclockwise direction.

What is a reflection of Y 1?

Explanation: the line y=1 is a horizontal line passing through all. points with a y-coordinate of 1. the point (3,10) reflected in this line. the x-coordinate remains in the same position.

Is Y =- 1 a function?

1 Answer. Yes, it is linear.