# SPACE SUMMARY

### MEET FIGURES IN SPACE

## Mediator plane:

how to prove :

method 1: prove that 3 pts are ebuidistant to the extrimities

method 2: The plane through the midpoint of a line segment and perpendicular to that segment, is called a mediating plane

method 1: prove that 3 pts are ebuidistant to the extrimities

method 2: The plane through the midpoint of a line segment and perpendicular to that segment, is called a mediating plane

## Axis

how to prove that a line is an axis of the circle circumscribed about a triangle :

the line should be perpendicular to the plane on the vertex of the right triangle

the line should be perpendicular to the plane on the vertex of the right triangle