Interior and Exterior Angles of a Triangle

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

What is an exterior angle of a triangle?

Back

An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side.

Front

How do you calculate an exterior angle of a triangle?

Back

An exterior angle is equal to the sum of the two opposite interior angles.

Front

What is the relationship between the interior and exterior angles of a triangle?

Back

The exterior angle is equal to the sum of the two non-adjacent interior angles.

Front

If one angle of a triangle is 60 degrees and another is 70 degrees, what is the measure of the third angle?

Back

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

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

What are the conditions for three angles to form a triangle?

Back

The sum of the three angles must equal 180 degrees, and each angle must be greater than 0 degrees.

Front

How can you determine if a set of three angles can form a triangle?

Back

Add the three angles together; if they equal 180 degrees, they can form a triangle.

Front

What is the formula to find the missing angle in a triangle?

Back

The formula is: Missing angle = 180 - (sum of the other two angles).

Front

What is the significance of the angles in a triangle?

Back

The angles determine the shape and type of triangle (e.g., acute, right, obtuse).