Chapter 11 - congruence, similarity and transformation

glencoe math accelerated 6th grade

What does 'congruent' mean in geometry?

Having the same size and shape.

What is a corresponding angle?

An angle that is in the same relative position at each intersection where a straight line crosses two others.

What are perpendicular lines?

Lines that intersect at a right angle (90 degrees).

Define vertical angles.

Angles that are opposite each other when two lines intersect, and they are always equal.

What are adjacent angles?

Angles that share a common side and a common vertex.

What are complementary angles?

Two angles that add up to 90 degrees.

What are supplementary angles?

Two angles that add up to 180 degrees.

What are alternate exterior angles?

Angles that lie outside two parallel lines and on opposite sides of a transversal.

What are alternate interior angles?

Angles that lie between two parallel lines and on opposite sides of a transversal.

What is rotation in geometry?

A transformation that turns a figure around a fixed point.

What is reflection in geometry?

A transformation that flips a figure over a line, creating a mirror image.

What is dilation in geometry?

A transformation that changes the size of a figure but not its shape.

What is a transformation in geometry?

An operation that moves or changes a shape to create a new shape.