Triangles--angles and side lengths

Front

What is a triangle?

Back

A triangle is a three-sided polygon.

Front

How many degrees are in a triangle?

Back

A triangle has a total of 180 degrees.

Front

If one angle of a triangle is 30 degrees and another is 70 degrees, what is the third angle?

Back

The third angle is 80 degrees.

Front

What is the minimum length of a side in a triangle if the other two sides are 4 inches and 6 inches?

Back

The minimum length must be greater than 2 inches.

Front

What is the maximum length of a side in a triangle if the other two sides are 4 inches and 6 inches?

Back

The maximum length must be less than 10 inches.

Front

Can a triangle have angles measuring 90, 45, and 45 degrees?

Back

Yes, this is a right triangle.

Front

What is the term for a triangle with all sides of different lengths?

Back

Scalene triangle.

Front

What is the term for a triangle with at least two equal sides?

Back

Isosceles triangle.

Front

What is the term for a triangle with all sides equal?

Back

Equilateral triangle.

Front

If two sides of a triangle are 4 inches and 6 inches, can the third side be 10 inches?

Back

No, the third side cannot be 10 inches.