When a pair of parallel lines meet an intersecting transversal, pairs of angles with particular properties are made. Corresponding angles are equal. The lines make an F shape. Notice that the F ...

If you have forgotten your basic geometry, parallel lines are represented by the little squares you see above, which signify 90-degree angles. Here’s the catch, non-Euclidean geometry does not ...

The sum of interior angles in a triangle is 180°. To prove \(a + b + c = 180^\circ\), firstly draw a line parallel to one side of the triangle. \(d = b\) (alternate angles are equal ...

In flat space, two parallel ... of lines) perpendicular to the lines themselves. Now, when we look at the perpendicular lines, the size of those lines decreases due to an increase in the angle ...