Introduction to Classifying Triangles

Front

What are the three main types of triangles based on side lengths?

Back

Equilateral, Isosceles, and Scalene.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all three angles equal to 60 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length and the angles opposite those sides are equal.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths and all angles of different measures.

Front

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

Back

180 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle measuring 90 degrees.

Front

What is a right isosceles triangle?

Back

A triangle that has a right angle and two sides of equal length.

Front

How can you determine if a triangle is isosceles by looking at its angles?

Back

If two angles are equal, the triangle is isosceles.

Front

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

Back

The larger the angle, the longer the opposite side; the smaller the angle, the shorter the opposite side.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides.