Congruency & Similarity Review

Front

What does it mean for two figures to be congruent?

Back

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

Tags

CCSS.8.G.A.2

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape but different sizes.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

Front

If a rectangle has a side length of 4 inches and is dilated by a scale factor of 2, what is the new side length?

Back

8 inches

Tags

CCSS.8.G.A.3

Front

What is the scale factor in a dilation?

Back

The scale factor is the ratio of the length of a side of the dilated figure to the length of the corresponding side of the original figure.

Tags

CCSS.8.G.A.3

Front

What is the result of reflecting a figure over the x-axis?

Back

The y-coordinates of the points of the figure change sign, while the x-coordinates remain the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

What is the result of reflecting a figure over the y-axis?

Back

The x-coordinates of the points of the figure change sign, while the y-coordinates remain the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Front

How can you determine if two figures are congruent by comparing their angles and sides?

Back

If all corresponding angles are equal and all corresponding sides are equal, the figures are congruent.

Tags

CCSS.8.G.A.2

Front

What is a dilation in geometry?

Back

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

Tags

CCSS.8.G.A.3

Front

If two triangles have sides in the ratio 2:3, are they similar?

Back

Yes, if the corresponding angles are also equal, the triangles are similar.

Tags

CCSS.HSG.SRT.A.2

Front

What is the difference between congruence and similarity?

Back

Congruence means same size and shape; similarity means same shape but different sizes.

Tags

CCSS.8.G.A.2