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°. 2. Right Triangle: One angle is exactly 90°. 3. Obtuse Triangle: One angle is greater than 90°.

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: All sides are different.

Front

How do you classify a triangle with one angle greater than 90°?

Back

It is classified as an Obtuse Triangle.

Front

What is an Equilateral Triangle?

Back

A triangle where all three sides are equal in length and all three angles are equal (each measuring 60°).

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 where all sides and angles are different.

Front

What is a Right Triangle?

Back

A triangle that has one angle measuring exactly 90°.

Front

If a triangle has two equal sides and one angle measuring 90°, what type of triangle is it?

Back

It is a Right Isosceles Triangle.

Front

What is the sum of the angles in any triangle?

Back

The sum of the interior angles in a triangle is always 180°.