Classifying Triangles

Front

What are the three main types of triangles based on their 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 three main types of triangles based on their sides?

Back

1. Equilateral Triangle: All three sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are of different lengths.

Front

How can you classify triangle RST if it has one angle greater than 90 degrees?

Back

It is classified as an obtuse triangle.

Front

If a triangle has sides of lengths 12, 9, and 15, how would you classify it?

Back

It is classified as a scalene triangle because all sides are of different lengths.

Front

What is the definition of an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Front

How many acute angles must an acute triangle have?

Back

An acute triangle must have 3 acute angles.

Front

What is the sum of the interior angles of any triangle?

Back

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

Front

What type of triangle has one angle that is exactly 90 degrees?

Back

A right triangle.

Front

Can a triangle be both isosceles and right?

Back

Yes, a triangle can be both isosceles and right if it has two equal sides and one right angle.

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle where all three sides are of different lengths.