Experimental Verifications of Angles

📐 Experimental Verification: Vertically opposite angles are equal
Intersecting Lines
Figure 1
Intersecting Lines
Figure 2
Figure ∠ROP ∠QOS ∠ROQ ∠POS Result
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✓ When two lines intersect, vertically opposite angles are equal
📐 Experiment 2: The sum of adjacent angles on a straight line is 180°

Click on the left or right side of vertex Q to measure the angles.

Linear Pair: Figure 1
Linear Pair: Figure 2
Figure ∠AQP ∠BQP ∠AQP + ∠BQP Result
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✓ Verified: The sum of adjacent angles on a straight line is 180°
📐 Experiment 3: Complete Angle at a Point
Figure 1
Figure 2
Figure ∠AOB ∠BOC ∠AOC ∠AOB + ∠BOC + ∠AOC Result
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✓ Conclusion: The complete angle at a point is 360°.