Читать книгу Geometric Formulas (Speedy Study Guides) - Speedy Publishing - Страница 3

Plane: A plane is a flat surface like a piece of paper. It extends in all directions. We can use arrows to show that it extends in all directions forever. The following is a plane.

Parallel lines: When two lines never meet in space or on a plane no matter how long we extend them, we say that they are parallel lines. The following lines are parallel.

Intersecting lines: When lines meet in space or on a plane, we say that they are intersecting lines The following are intersecting lines.

Vertex: The point where two rays meet is called a vertex. In the angle below, point A is a vertex.

Geometry Formulas