In the figure below, lines l and m are parallel lines. What can you say about the areas of triangle ABC and triangle ADC? The distance between two parallel lines is equal at any point, so the two triangles have the same altitude (can you see why?). Further, the two triangles have a common base, […]

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# Posts tagged with 'parallel lines'

## On Equations of Intersecting, Coinciding, and Parallel Lines

When we have two lines on a plane, there are three possibilities: the lines will never meet (parallel) the lines will meet at one point (intersecting) the lines will meet at infinitely many points (coinciding). As for the third case, coinciding means that lines which are on top of each other. In Algebra, we have […]

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## The 3 Saddest Mathematics Love Stories

There are many unfortunate events in mathematics as well as the lives of mathematicians. You haven’t probably heard the misfortunes of Evariste Galois; he died at the age of 20 in a duel for a lady who didn’t love him.You probably know some famous theorems by great mathematicians, but you probably didn’t know that they died young. […]

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