Angles in a Triangle

What is a "Scalene" Triangle?

• A triangle with all sides of equal lengths.

• A triangle with two sides of equal lengths.

• A triangle with all sides of different lengths.

• A triangle with one right angle.

What is a "Right" Angle?

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 45 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 180 degrees.

How do you find the measure of an unknown angle in a triangle?

• Add the known angles together and multiply by 2.

• Subtract the sum of the known angles from 180 degrees.

• Divide the sum of the known angles by 2.

• Use the Pythagorean theorem to find the angle.

If one angle of a triangle is 90 degrees and another is 45 degrees, what is the measure of the third angle?

• 30 degrees

• 45 degrees

• 60 degrees

• 75 degrees

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

• Equilateral triangle

• Scalene triangle

• Isosceles triangle

• Right triangle

What is the definition of supplementary angles?

• Two angles that add up to 90 degrees.

• Two angles that add up to 180 degrees.

• Two angles that are equal in measure.

• Two angles that are adjacent to each other.

What is an "Obtuse" Angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 90 degrees.

• An angle that measures more than 90 degrees but less than 180 degrees.

• An angle that measures more than 180 degrees.

What is the relationship between the angles in a triangle?

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

• The sum of the angles in a triangle is always 90 degrees.

• The sum of the angles in a triangle can vary depending on the type of triangle.

• The sum of the angles in a triangle is always 360 degrees.

What is an "Acute" Angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 90 degrees.

• An angle that measures more than 90 degrees but less than 180 degrees.

• An angle that measures exactly 180 degrees.

If the angles of a triangle are represented as x, x + 20, and x + 40, what is the value of x?

• 20 degrees

• 30 degrees

• 40 degrees

• 50 degrees