Classifying triangles

Front

What is a triangle?

Back

A polygon with three edges and three vertices.

Front

What are the types of triangles based on sides?

Back

1. Equilateral: All sides are equal. 2. Isosceles: Two sides are equal. 3. Scalene: All sides are different.

Front

What are the types of triangles based on angles?

Back

1. Acute: All angles are less than 90 degrees. 2. Right: One angle is exactly 90 degrees. 3. Obtuse: One angle is greater than 90 degrees.

Front

Define an equilateral triangle.

Back

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

Front

Define an isosceles triangle.

Back

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

Front

Define a scalene triangle.

Back

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

Front

What is an acute triangle?

Back

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

Front

What is a right triangle?

Back

A triangle that has one angle measuring exactly 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle that has one angle measuring more than 90 degrees.

Front

What is an equiangular triangle?

Back

A triangle where all three angles are equal, which also makes it equilateral.