Triangle Fundamentals

Front

What is the relationship between the sides and angles in a triangle?

Back

In a triangle, the smallest angle is opposite the smallest side, and the largest angle is opposite the largest side.

Front

How do you determine the order of sides based on angle measures?

Back

The sides of a triangle can be ordered from greatest to least based on the measures of the angles opposite those sides.

Front

What is the Triangle Inequality Theorem?

Back

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

Front

If two angles of a triangle are known, how can you find the third angle?

Back

The third angle can be found by subtracting the sum of the known angles from 180 degrees.

Front

What is the minimum length of the third side if two sides are 3 ft and 7 ft?

Back

The least possible whole number measure for the third side is 5 ft.

Front

How do you order angles in a triangle from greatest to least?

Back

Order the angles based on their measures; the largest angle corresponds to the longest side.

Front

What does it mean if m∠C < m∠B < m∠A in Triangle ABC?

Back

It means that angle A is the largest, angle B is the second largest, and angle C is the smallest.

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.

Front

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is a scalene triangle?

Back

A scalene triangle has all sides of different lengths.