IP--Triangles...All Triangle Notes

Front

What is an obtuse triangle?

Back

A triangle with one angle measuring more than 90 degrees.

Front

How many acute angles does an acute triangle have?

Back

An acute triangle has three acute angles, each measuring less than 90 degrees.

Front

What is the maximum number of right angles a triangle can have?

Back

A triangle can have a maximum of one right angle.

Front

Can a triangle have sides of lengths 3, 4, and 9?

Back

No, these lengths do not satisfy the triangle inequality theorem.

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 in which all three sides are of equal length and all three angles are equal, each measuring 60 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle measuring exactly 90 degrees.

Front

What is an acute triangle?

Back

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

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 a scalene triangle?

Back

A triangle in which all three sides are of different lengths.