Creating Triangles

Front

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

Back

180 degrees.

Front

What is the Triangle Inequality Theorem?

Back

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

Front

Which of the following sets of angles can form a triangle? 1° , 90° , 89° or 80° , 70° , 40°?

Back

1° , 90° , 89° can form a triangle, while 80° , 70° , 40° cannot.

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all three angles equal to 60 degrees.

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is a scalene triangle?

Back

A triangle with all sides of different lengths.

Front

If two angles of a triangle are 47° and 57°, what is the measure of the third angle?

Back

76°.

Front

What is the relationship between the sides and angles of a triangle?

Back

The larger the angle, the longer the opposite side.

Front

Can a triangle have one angle greater than 90 degrees?

Back

Yes, it is called an obtuse triangle.

Front

What is a right triangle?

Back

A triangle that has one angle measuring 90 degrees.