Angle Properties for P5/P6: Notes + Practice Questions

Walter Education
Jun 30
2 min read

Updated: Aug 9

📐 Did You Know? Angles and Geometry make up 20% of PSLE Math—the 3rd most-tested topic after Numbers and Measurements. Ace this, and you’re one step closer to exam success! Ready to crack the code of angles? Let’s dive in!

How to measure angles?

What are Angles?

Angles are formed when two straight lines meet or cross each other.
The point where the lines meet is called the vertex.
The size of an angle is measured in degrees (°).

Key Angle Properties Your Child Must Know

Basic Angle Types

Right Angle: Exactly 90° (Like a perfect "L" shape)
Acute Angle: Less than 90° (Small and sharp)
Obtuse Angle: More than 90° (Wide and open)

Advanced Angle Rules

Straight Line: Angles add up to 180°.
Vertically Opposite: Equal angles (Look for the "X" shape).
Alternate/Corresponding/Interior Angles: Critical for parallel lines!

Shapes & Their Angle Secrets

Bonus Tip:

Equilateral = Equal everything!
Isosceles = Two sides & angles match!
Scalene = No sides or angles the same!

Past PSLE Angle Question !

(PSLE 2024, Paper 2 Qn 13, 5 marks)

Question:

Avoid These 4 Common Mistakes!

Mislabeling angles → Always name them clearly.
Skipping steps → Show every calculation.
Forgetting units → Always write "°" for degrees.
Assuming ungiven parallels → Stick to the question’s clues!

Free Download & Next Steps

📥 Click here for your FREE Angles & Geometry Cheat sheet – Perfect for last-minute revision !

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