Geometry 3rd Quarter

• A circle is defined as the set of all points in a plane that are equidistant from the center.
• One Greek mathematician who studied the conic sections extensively is Apollonius of Perga.
• The conjugate axis of an ellipse is always shorter than its major axis.
• The principal axis of an ellipse is the line segment passing through the center of the ellipse and terminating at both ends on the ellipse itself.
• The principal axis of an ellipse passes through its foci.
• An ellipse is a set of points in a plane such that the sum of the distances from the foci to any point on the ellipse is constant.
• Diameter


  Passes through the center of the circle and is twice the length of the radius
• Conic Sections - a curve formed by the intersection of a plane and a double cone.
• Circle the set of all points in a plane that are a distance r (radius) from a given point called the center.
• Eccentricity - is a parameter that describes the shape of an ellipse.
• Major axis - It is the line segment joining the vertices of a circle.