Identification and Verification of the Properties of Trapezium

📐 Experiment 1: Co-interior angles between parallel lines are supplementary 180°
A B C D
Figure a
A B C D
Figure b
A B C D
Figure c
Figure ∠DAB ∠ADC ∠DAB + ∠ADC ∠ABC ∠BCD ∠ABC + ∠BCD Result
(a)
(b)
(c)