Triangle sides and angles

Front

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

Back

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

Front

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180 degrees.

Front

What is the Triangle Inequality Theorem?

Back

The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.

Front

How many unique triangles can be formed with angles 80°, 50°, and 50°?

Back

More than one unique triangle can be formed with angles 80°, 50°, and 50°.

Front

What is the condition for three sides to form a triangle?

Back

The lengths of the three sides must satisfy the Triangle Inequality Theorem.

Front

If a triangle has sides of lengths 2, 15, and 16, how many triangles can be formed?

Back

Exactly one unique triangle can be formed.

Front

What is an isosceles triangle?

Back

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

Front

What is a scalene triangle?

Back

A scalene triangle is a triangle in which all three sides have different lengths.

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all angles are 60 degrees.

Front

How many triangles can be formed with sides 7, 5, and 4?

Back

Exactly one unique triangle can be formed.