Types of Angles

Types of Angles

Objective: Use right angles to determine whether angles are equal to, greater than, or less than right angles. Draw right, obtuse, and acute angles.

Angle

two rays that meet at a single endpoint.

Right Angle

An angle that has a square corner.

A right angle is sometimes called a 90 degree angle.

Acute Angle

An angle that is less than a 90 degree angle.

An acute angle looks like a book that is more closed than open.

Obtuse Angle

An angle that is greater than a 90 degree angle.

An obtuse angle looks like like a book that is more open than closed.

Poll

Tell whether the first angle is acute, obtuse, or right.

• Obtuse

• Right

• Acute

Poll

Tell whether the second angle is acute, obtuse, or right.

• Acute

• Right

• Obtuse

Poll

Tell whether the third angle is acute, obtuse, or right.

• Acute

• Obtuse

• Right

Poll

Tell whether the forth angle is acute, obtuse, or right.

• Acute

• Right

• Obtuse

Open Ended

Practice!!! What is the following angle and why?

Open Ended

What is the following angle and why?

Open Ended

What is the following angle and why?

Open Ended

What is the following angle and why?