Triangle Properties Review

Front

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

Back

180 degrees

Front

What is the smallest angle in a triangle with angles ∠A, ∠B, ∠C?

Back

The smallest angle is the one with the least measure.

Front

Which set of numbers can represent the lengths of the sides of a triangle?

Back

The lengths must satisfy the triangle inequality theorem.

Front

What is the triangle inequality theorem?

Back

The sum of the lengths of any two sides must be greater than the length of the third side.

Front

If two sides of a triangle are 17 meters and 12 meters, what is the range for the third side?

Back

5 < x < 29

Front

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

Back

Use the fact that the sum of the angles is 180 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two equal sides.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is an equilateral triangle?

Back

A triangle with all three sides equal and all angles measuring 60 degrees.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.