Hello my wonderful Grade 5 superstar! 👋
I'm Kashef and today we're learning about Obtuse Angles! Obtuse angles are bigger than a right angle (more than 90°) but smaller than a straight line (less than 180°). They look wide and open — like the mouth of a surprised fish or the bend in a hockey stick! Ready to explore big angles? Let’s go! 🚀
🧠 What is an Obtuse Angle?
An angle that measures more than 90° but less than 180°.
This wide angle is obtuse!
🔄 Acute vs Right vs Obtuse
- Acute Angle → Less than 90° (small & sharp)
- Right Angle → Exactly 90° (perfect corner)
- Obtuse Angle → More than 90° but less than 180° (wide & open)
📍 Obtuse Angles in Real Life
🦈 The wide open mouth of a shark
🏠 The angle at the top of a roof (sometimes)
✂️ Scissors when opened wide
🏹 The bend in a boomerang or hockey stick
🎯 Is It Obtuse?
1. An angle of 120° is...
2. An angle of 80° is acute, right, or obtuse?
3. Name something that has an obtuse angle.
🧪 Quick Obtuse Angles Quiz
Question: An obtuse angle is always...
You are an Obtuse Angle Expert! 🎉🥳
Kashef is super proud of you! You can now recognize obtuse angles and compare them with acute and right angles.
Obtuse angles are wide and open — they help make interesting shapes in our world!