Classifying Triangles by Sides and Angles

Front

What is a triangle classified as if it has one angle greater than 90 degrees?

Back

An obtuse triangle.

Front

True or False: A right triangle has two right angles.

Back

False.

Front

What do the lines (sticks) on a triangle indicate?

Back

The lines (sticks) show that the sides are equal.

Front

What is a triangle called if all its sides are of different lengths?

Back

A scalene triangle.

Front

What is a triangle classified as if it has one right angle?

Back

A right triangle.

Front

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

Back

180 degrees.

Front

What type of triangle has all three sides of equal length?

Back

An equilateral triangle.

Front

What is the classification of a triangle with two equal sides?

Back

An isosceles triangle.

Front

How can you determine if a triangle is a right triangle using the lengths of its sides?

Back

By applying the Pythagorean theorem: a² + b² = c².

Front

What is the classification of a triangle with angles measuring less than 90 degrees?

Back

An acute triangle.