Question Video: Checking the Congruence between Two Straight Lines | Nagwa Question Video: Checking the Congruence between Two Straight Lines | Nagwa

# Question Video: Checking the Congruence between Two Straight Lines

Are lines ππ and ππ congruent?

01:18

### Video Transcript

Are lines ππ and ππ congruent?

What do we know about congruent lines? Congruent lines have the same length. And that means we need to know if line segment ππ has the same length as line segment ππ. Line segment ππ has a length of eight π plus four π. Line segment ππ has a length of six π plus six π.

The π variable will stay the same. And weβll add their coefficients together. Weβll add the numbers in front of the π together. Here, eight plus four equals 12. And the π stays the same. If we add the coefficients again for ππ, we get six plus six equals 12. And we bring down the π. Weβre seeing that line segment ππ measures 12π. And line segment ππ measures 12π. They have the same length.

And that means yes, these lines are congruent.

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