Interior Angles of a Triangle

What is a scalene triangle?

• A triangle with all sides of equal lengths.

• A triangle with at least two sides of equal lengths.

• A triangle with all sides of different lengths.

• A triangle that has one right angle.

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

• 150 degrees

• 180 degrees

• 200 degrees

• 90 degrees

If one angle of a triangle is 90 degrees, what type of triangle is it?

• Right triangle

• Acute triangle

• Obtuse triangle

• Equilateral triangle

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

• Missing angle = 180 - (angle1 + angle2)

• Missing angle = 90 - (angle1 + angle2)

• Missing angle = 360 - (angle1 + angle2)

• Missing angle = (angle1 + angle2) / 2

What is the definition of a triangle?

• A triangle is a polygon with three edges and three vertices.

• A triangle is a shape with four sides and four angles.

• A triangle is a three-dimensional figure with three faces.

• A triangle is a polygon with two edges and one vertex.

What is the measure of each angle in an equilateral triangle?

• 45 degrees

• 60 degrees

• 90 degrees

• 120 degrees

What is an isosceles triangle?

• A triangle with all sides of equal length.

• A triangle with at least two sides of equal length.

• A triangle with no sides of equal length.

• A triangle with one right angle.

How can you classify triangles based on their angles?

• Acute, right, or obtuse

• Equilateral, isosceles, or scalene

• Congruent, similar, or asymmetric

• Obtuse, reflex, or straight

What is the exterior angle theorem?

• The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

• The exterior angle of a triangle is equal to the difference of the two opposite interior angles.

• The exterior angle of a triangle is always greater than 90 degrees.

• The exterior angle of a triangle is equal to the sum of all three interior angles.

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

• 40 degrees

• 50 degrees

• 60 degrees

• 70 degrees