In the figure, find the value of x.
Produce AE to meet BC at D.
Now in ΔABD, we have exterior ∠ADC = ∠A + ∠B
... ∠ADC = 25° + 55° = 80°
Again in ∠DCE, we have
exterior ∠AEC = ∠EDC + ∠ECD
Þ = ∠ADC + ∠ECD
x° = 80° + 60° = 140°
Now in ΔABD, we have exterior ∠ADC = ∠A + ∠B
... ∠ADC = 25° + 55° = 80°
Again in ∠DCE, we have
exterior ∠AEC = ∠EDC + ∠ECD
Þ = ∠ADC + ∠ECD
x° = 80° + 60° = 140°
AI is thinking…
Couldn't generate an explanation.
Generated by AI. May contain inaccuracies — always verify with your textbook.
of a right angle. Prove that m || n.