IM Grade 8 Unit 1: Transformations and Congruency

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect.

Front

What are the three transformations we've worked on in class?

Back

Translations, Reflections, Rotations.

Front

Which statement is true about transformations?

Back

Transformations never change the size or angles of the shape.

Front

Which are pairs of vertical angles?

Back

∠COB & ∠AOD.

Front

What is the measure of ∠2 if it is vertical to ∠1 which measures 38°?

Back

142°.

Front

What is a transformation in geometry?

Back

A change in the position, size, or shape of a figure.

Front

Define reflection in geometry.

Back

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

Front

What is a rotation in geometry?

Back

A transformation that turns a figure around a fixed point.

Front

What is a translation in geometry?

Back

A transformation that slides a figure from one position to another without turning it.

Front

What is congruency in geometry?

Back

Two figures are congruent if they have the same shape and size.