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Measuring Angles
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Measuring Angles
📐 Part 1: Angle Classification
1. Which angle type measures exactly 90°?
Acute angle
Right angle
Obtuse angle
Straight angle
2. An angle that measures 125° is classified as:
Acute angle
Right angle
Obtuse angle
Reflex angle
3. Which of these could be acute angles? (Tick all that apply)
45°
89°
91°
30°
4. A reflex angle measures:
Less than 90°
Between 90° and 180°
Exactly 180°
More than 180°
📏 Part 2: Using a Protractor
5. When using a protractor to measure an angle, the first step is to:
6. Measure the following angles using your protractor and classify each one:
Angle A: ______° Classification: _______________
Angle B: ______° Classification: _______________
Angle C: ______° Classification: _______________
7. If two angles on a straight line measure 65° and x°, what is the value of x?
x = _______°
8. Three angles around a point measure 85°, 140°, and y°. Calculate y:
y = _______°
🎯 Part 3: Extension Challenge
9. Advanced: If vertically opposite angles are equal, and one angle measures (2x + 30)°, write an expression for its vertically opposite angle:
10. Real-world connection: Explain one situation where accurate angle measurement is important in everyday life:
11. Problem solving: Draw and measure an obtuse angle, then calculate what angle would be needed to make a complete turn (360°):
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