Angles

An angle measures 315°. What type of angle is it?

• Reflex angle
• Obtuse angle
• Straight angle
• Right angle

Which rule best explains why an angle of 270° is called a reflex angle?

• It is greater than 180° and less than 360°.
• It is exactly 180°.
• It is exactly 90°.
• It has no vertex.

An angle measures 270°. What type of angle is it?

• Straight angle
• Reflex angle
• Obtuse angle
• Right angle

Which rule best explains why an angle of 210° is called a reflex angle?

• It has no vertex.
• It is exactly 180°.
• It is exactly 90°.
• It is greater than 180° and less than 360°.

An angle measures 210°. What type of angle is it?

• Reflex angle
• Obtuse angle
• Right angle
• Straight angle

An angle measures 180°. What type of angle is it?

• Straight angle
• Obtuse angle
• Right angle

Which rule best explains why an angle of 150° is called a obtuse angle?

• It has no vertex.
• It is exactly 90°.
• It is greater than 90° and less than 180°.
• It is exactly 180°.

Which rule best explains why an angle of 135° is called a obtuse angle?

• It has no vertex.
• It is exactly 90°.
• It is exactly 180°.
• It is greater than 90° and less than 180°.

An angle measures 135°. What type of angle is it?

• Right angle
• Straight angle
• Obtuse angle

Which rule best explains why an angle of 120° is called a obtuse angle?

• It is exactly 180°.
• It is exactly 90°.
• It has no vertex.
• It is greater than 90° and less than 180°.

An angle measures 120°. What type of angle is it?

• Straight angle
• Obtuse angle
• Right angle

Which rule best explains why an angle of 100° is called a obtuse angle?

• It is greater than 90° and less than 180°.
• It is exactly 90°.
• It is exactly 180°.
• It has no vertex.

An angle measures 100°. What type of angle is it?

• Right angle
• Obtuse angle
• Straight angle

An angle measures 90°. What type of angle is it?

• Straight angle
• Obtuse angle
• Right angle

Which rule best explains why an angle of 75° is called a acute angle?

• It has no vertex.
• It is exactly 90°.
• It is exactly 180°.
• It is less than 90°.

Which rule best explains why an angle of 60° is called a acute angle?

• It is exactly 180°.
• It has no vertex.
• It is less than 90°.
• It is exactly 90°.

An angle measures 60°. What type of angle is it?

• Obtuse angle
• Straight angle
• Acute angle
• Right angle

Which rule best explains why an angle of 45° is called a acute angle?

• It is exactly 180°.
• It is exactly 90°.
• It is less than 90°.
• It has no vertex.

An angle measures 45°. What type of angle is it?

• Acute angle
• Straight angle
• Obtuse angle
• Right angle

Which rule best explains why an angle of 30° is called a acute angle?

• It is exactly 180°.
• It is less than 90°.
• It is exactly 90°.
• It has no vertex.