Triangles Practice

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

What are the three sides of a triangle called?

Back

The three sides of a triangle are called the base, height, and the two legs.

Front

What is the minimum length a side of a triangle can be if the other two sides are 5 and 5?

Back

The minimum length of the third side must be greater than 0 and less than 10.

Front

Which lengths cannot represent the sides of a triangle?

Back

The lengths must satisfy the triangle inequality theorem: the sum of the lengths of any two sides must be greater than the length of the third side.

Front

If two sides of a triangle are equal, what type of triangle is it?

Back

It is an isosceles triangle.

Front

What is the maximum length of the third side of a triangle with sides of lengths 5 and 5?

Back

The maximum length of the third side can be less than 10.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

If a triangle has angles of 60 degrees and 70 degrees, what is the third angle?

Back

The third angle is 50 degrees (180 - 60 - 70 = 50).

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle with all sides of different lengths.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).