Unit 1-3 Vocabulary

When two parallel lines are crosses by another line called a transversal, these angles are inside the parallel lines and on opposite sides of the transversal.

• Alternate Interior Angles

• Vertical Angles

• Straight Angles

• Right Angles

Turn in the same direction as the hands of a clock. The top turns to the right.

• Congruent

• Left

• Counterclockwise

• Clockwise

A fixed point on a plane and it is the starting point from which we measure distance in dilations.

• Center of Rotation

• Similar

• Center of Dilation

• Scale Factor

One figure is ________ to another if it can be moved with translations, rotations, and reflections to fit exactly over the other.

• Similar

• Dilation

• Congruent

• Transformation

A system for telling where points are.

• Image

• Coordinate Pair

• Coordinate Plane

• Transformation

When part of the original figure matches up with part of a copy.

• Similar

• Corresponding

• Congruent

• Dilation

To turn in the opposite way the hands of a clock turn. The top turns to the left.

• Clockwise

• Counterclockwise

• Right

• Image

A transformation in which each point on a figure moves along a line and changes its distance from a fixed point.

• Rotation

• Translation

• Reflection

• Dilation

A transformation that moves every point on a figure to a point directly on the opposite side of the line. The new point is the same distance from the line as it was in the original figure.

• Rotation

• Translation

• Reflection

• Dilation

The result of translations, rotations, and reflections on an object. Every part of the original object moves in the same way to match up with it.

• Transformation

• Image

• Congruent

• Scale Factor