Real-world examples of obtuse angles for kids

📚 Quick Study Guide

• 📐 An obtuse angle is an angle that measures greater than $90^{\circ}$ and less than $180^{\circ}$.
• 🍕 Think of a slice of pizza! If the slice is wider than a right angle (a corner), it's likely an obtuse angle.
• ⏰ Look at a clock! The angle between the hands can be obtuse at certain times of the day.
• 🚪 A door opened more than a right angle creates an obtuse angle with the doorframe.

Practice Quiz

1. Which of the following is an example of an obtuse angle?
1. A. The corner of a square
2. B. The angle formed by a partially opened laptop screen (more than 90 degrees)
3. C. The angle formed by two straight lines
4. D. The angle of a closed book
2. A slice of pizza is cut such that it's wider than a right angle. What type of angle does the slice represent?
1. A. Acute angle
2. B. Right angle
3. C. Obtuse angle
4. D. Straight angle
3. What time on an analog clock might show an obtuse angle between the hour and minute hands?
1. A. 3:00
2. B. 6:00
3. C. 2:00
4. D. 1:00
4. A door is opened wider than a right angle. What kind of angle is formed between the door and the doorframe?
1. A. Acute angle
2. B. Right angle
3. C. Obtuse angle
4. D. Straight angle
5. Which of the following angles is an obtuse angle?
1. A. $45^{\circ}$
2. B. $90^{\circ}$
3. C. $120^{\circ}$
4. D. $60^{\circ}$
6. If a book is slightly opened, so the angle between the covers is greater than 90 degrees but less than 180 degrees, what type of angle is formed?
1. A. Acute angle
2. B. Right angle
3. C. Obtuse angle
4. D. Straight angle
7. Which shape commonly features obtuse angles?
1. A. Rectangle
2. B. Acute triangle
3. C. Obtuse triangle
4. D. Square