Classifying Triangles

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.

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

What is an Acute Triangle?

Back

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

Front

What is a Right Triangle?

Back

A Right Triangle is a triangle that has one angle equal to 90 degrees.

Front

What is an Obtuse Triangle?

Back

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

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in any triangle is always 180 degrees.

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180 degrees.

Front

What is a Not a Triangle condition?

Back

If the sum of any two angles is less than or equal to the third angle, it is not a triangle.

Front

Example of an Acute Triangle: 30 degrees, 60 degrees, 90 degrees. Is it an Acute Triangle?

Back

Yes, all angles are less than 90 degrees.

Front

Example of a Right Triangle: 45 degrees, 45 degrees, 90 degrees. Is it a Right Triangle?

Back

Yes, it has one angle that is exactly 90 degrees.