What makes edges parallel to each other

If two given parallel lines are cut by transversal lines, then the alternate interior angles are equal. If two straight lines that are parallel to each other are intersected by a transversal then the pair of alternate exterior angles will always be equal. If two straight lines that are parallel to each other are intersected by a transversal then the pair of corresponding angles will always be equal.

If two straight lines that are parallel to each other are intersected by a transversal then the interior angles on the same side of the transversal are supplementary. If two straight lines that are parallel to each other are intersected by a transversal then the pair of vertical angles will always be equal.

If two angles in a parallel line form a linear pair, they are supplementary. The two parallel lines theorems are given below:. Theorem 1. If two straight lines which are parallel to each other are intersected by a transversal then the pair of alternate interior angles are equal. In the above figure, you can see. The Converse of Theorem 1 is also true which defines that if the pairs of alternate interior angles are equal then the given lines will always be parallel to each other.

Theorem 2. If two given straight lines which are parallel to each other and are intersected by a transversal then the pair of interior angles on the same side of transversal lines are supplementary. The converse of Theorem 2 is also valid which defines that if the pair of interior angles on the same sides of transversal are supplementary then the given lines will always be parallel to each other.

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Active Oldest Votes. A cuboid is a space shape with six rectangular faces. Its angles are all right angles and its opposite faces are equal and parallel to each other. If all the faces of a cuboid are square , it is usually known as a cube. If the bases of a cuboid are square, it is also called a square prism.

A cuboid is one of the most common shapes in everyday life.