Math Expressions Angles

What kind of angles are Angles A, B, C and D?

• Right angle

• Obtuse angle

• Acute angle

• Straight angle

Which term refers to any polygon having 4 sides?

• triangle

• quadrilateral

• pentagon

• hexagon

How many right angles are there in a square?

If the total measure of all the angles is 134 degrees, what is the measure of the missing angle?

Answer explanation

Add together the angles you know, 61 + 30, then subtract from 134 degrees.

>> Always subtract to find the missing angle.

Frank is using a protractor to construct an angle that measures 65°. First he draws ray PQ, as shown on the protractor. To complete the 65° angle, Frank should draw another ray that starts at point P and passes through —

• point S

• point R

• point V

• point T

Q1. What is the angle of a right angle?

• 45 degrees

• 90 degrees

• 120 degrees

• 135 degrees

What kind of angle is this?

• straight

• acute

• right

• obstuse

Q1. What is the angle of a straight line?

• A) 82 degrees

• B) 49 degrees

• C) 180 degrees

• D) 131 degrees

Angle 1 and angle 2 form a right angle. The measure of angle 1 is 32°. What is the measure of angle 2?

• A. 32°

• B. 62°

• C. 90°

• D. 58°

What type of angle is this? Is it straight, right, obtuse, or acute?