Properties of Triangles

Front

What are the three main types of triangles based on side lengths?

Back

Scalene, Isosceles, Equilateral.

Front

How can you classify a triangle with all sides of different lengths?

Back

It is classified as a Scalene triangle.

Front

What is the classification of a triangle with at least two equal sides?

Back

It is classified as an Isosceles triangle.

Front

What is the classification of a triangle with all sides equal?

Back

It is classified as an Equilateral triangle.

Front

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

Back

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

Front

What inequality must be satisfied for three lengths to form a triangle?

Back

The sum of the lengths of any two sides must be greater than the length of the third side.

Front

If a triangle has angles measuring 60°, 60°, and 60°, what type of triangle is it?

Back

It is an Equilateral triangle.

Front

What equation can be used to find an unknown angle in a triangle?

Back

The equation is: angle1 + angle2 + angle3 = 180°.

Front

How do you solve for an unknown angle in a triangle if you know the other two angles?

Back

Subtract the sum of the known angles from 180°.

Front

Can a triangle have sides of lengths 5, 10, and 15?

Back

No, because 5 + 10 is not greater than 15.