Classifying Triangles

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

What are the types of triangles based on sides?

Back

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: No sides are equal.

Front

What are the types of triangles based on angles?

Back

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

Front

How can you identify an equilateral triangle?

Back

An equilateral triangle has all three sides of equal length and all three angles equal to 60 degrees.

Front

How can you identify an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length and the angles opposite those sides are equal.

Front

How can you identify a scalene triangle?

Back

A scalene triangle has all sides of different lengths and all angles of different measures.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring exactly 90 degrees.

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle greater than 90 degrees.

Front

If a triangle has one angle that is 90 degrees, what type of triangle is it?

Back

It is a right triangle.