Triangles

Front

Does the side 3, 4, 9 make a triangle?

Back

No, the sum of the lengths of any two sides must be greater than the length of the third side.

Front

The lengths of two sides are given (8, 5). What are the possible lengths of the third side?

Back

The length of the third side must be between 3 and 13.

Front

Solve for x: 2x + 3 = -5

Back

x = -4.

Front

Find the value of x: 3x - 5 = 16

Back

x = 7.

Front

The lengths of two sides are given (10, 10). What are the possible lengths of the third side?

Back

The length of the third side must be between 0 and 20.

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

What is an equilateral triangle?

Back

A triangle with all three sides of equal length.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.