Geometry Chapter 4 Review

Front

What is the sum of the interior angles of a triangle?

Back

180 degrees.

Front

Define an acute triangle.

Back

A triangle where all three angles are less than 90 degrees.

Front

Define an obtuse triangle.

Back

A triangle that has one angle greater than 90 degrees.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What does the acronym SAS stand for in triangle congruence?

Back

Side-Angle-Side.

Front

What does the acronym SSS stand for in triangle congruence?

Back

Side-Side-Side.

Front

What does the acronym ASA stand for in triangle congruence?

Back

Angle-Side-Angle.

Front

What does the acronym HL stand for in triangle congruence?

Back

Hypotenuse-Leg (specific to right triangles).

Front

How do you find the measure of a missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.