Master Angle Properties for P5/P6: Free Notes + Practice Questions

📐 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!

🎁 P.S. Scroll down to grab your FREE Angles & Geometry Cheatsheet (A4 PDF)!

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!

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Shapes & Their Angle Secrets

Triangles (3-Sided Shapes)

• Equilateral: All sides/angles equal (60° each).

• Isosceles: Two equal sides/angles.

• Scalene: All sides/angles different.

• Right-Angle Triangles: One 90° corner.

  
  

Quadrilaterals (4-Sided Shapes)

• Square/Rectangle: All angles = 360°, parallel sides.

• Trapezium: Only 1 pair of parallel sides.

Properties of Shapes (9 slides)

Past PSLE Angle Question !

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

Question:

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Avoid These 4 Common Mistakes!

1. Mislabeling angles → Always name them clearly.

2. Skipping steps → Show every calculation.

3. Forgetting units → Always write "°" for degrees.

4. 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 !

Line and Angle Math.pdf

Download PDF • 604KB

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