## Right Angles

#### What is a right angle?

When an angle between two lines is exactly 90° it is called a right angle. Two lines are perpendicular to each other.

#### 1. Study the marked angles on the objects below.

Each of the marked angles is a right angle.

#### 2. Which of the angles below is smaller than a right angle?

Which one is greater than a right angle?

Which one is a right angle?

Let's use a ruler to check for right angles.

#### 3. How many right angles are there in each figure below?

**Figure A:**

**Figure B:**

**Figure C:**