BR Geometry Semester 1

Front

What is the scale factor from one triangle to another?

Back

The scale factor is the ratio of the lengths of corresponding sides of two similar triangles.

Front

What does SAS stand for in triangle congruence?

Back

SAS stands for Side-Angle-Side, a criterion for triangle congruence.

Front

What does HL stand for in triangle congruence?

Back

HL stands for Hypotenuse-Leg, a criterion for congruence of right triangles.

Front

If two triangles are similar, what can be said about their angles?

Back

The angles of similar triangles are congruent.

Front

What is an acute triangle?

Back

An acute triangle is a triangle that has all three angles less than 90 degrees.

Front

What is the definition of similar triangles?

Back

Similar triangles are triangles that have the same shape but may differ in size; their corresponding angles are equal and their corresponding sides are proportional.

Front

What is the relationship between the sides of similar triangles?

Back

The lengths of corresponding sides of similar triangles are in proportion.

Front

How do you find the missing side in similar triangles?

Back

Use the proportion of the lengths of corresponding sides to set up a ratio and solve for the missing side.

Front

What is the definition of congruent triangles?

Back

Congruent triangles are triangles that are identical in shape and size; all corresponding sides and angles are equal.

Front

What does the term 'proportional' mean in geometry?

Back

Proportional means that two quantities maintain a constant ratio to each other.