📐 Part 1: Know Your Angles

Angle Types to Remember:

🔹 Acute angle — less than 90°  |  🔹 Right angle — exactly 90°  |  🔹 Obtuse angle — greater than 90° but less than 180°

a) 45°

b) 90°

c) 130°

d) 72°

📏 Part 2: Measuring Angles in Real Objects

Instructions: Use your protractor to measure the angle on each real-life object shown (or pointed out by your teacher). Record the object name, the angle you measured, and its classification in the table below.

💡 Tip: Line up the centre of your protractor with the vertex (corner) of the angle, and make sure one arm lines up with the base line.

Object / Description                  Measured Angle (°)                  Classification

Name of object: _______________________________

Measured angle: _________ °

Classification (circle one):   Acute  /  Right  /  Obtuse

Name of object: _______________________________

Measured angle: _________ °

Classification (circle one):   Acute  /  Right  /  Obtuse

Name of object: _______________________________

Measured angle: _________ °

Classification (circle one):   Acute  /  Right  /  Obtuse

Name of object: _______________________________

Measured angle: _________ °

Classification (circle one):   Acute  /  Right  /  Obtuse

🌟 Part 3: Extension — Turns and Fractions of a Circle

Think about how angles relate to turns. A full turn around in a circle = 360°.

A quarter turn = _________ °    This is the same as a _____________ angle.

A half turn = _________ °    This is called a _____________ angle.

A full turn = _________ °