Naming 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 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

What is an isosceles triangle?

Back

An isosceles triangle has at least two sides that are equal in length.

Front

What is a right triangle?

Back

A right triangle has one angle that measures exactly 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle has one angle that measures more than 90 degrees.

Front

How do you classify a triangle with one 90-degree angle and two equal sides?

Back

It is classified as a right isosceles triangle.

Front

What is the sum of the angles in a triangle?

Back

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

Front

If one angle in a triangle is 105 degrees, what type of triangle is it?

Back

It is an obtuse triangle.

Front

How do you find the missing angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.