Geo unit 12

Isometric Geometry

Corner views of three-dimensional objects on two-dimensional paper.

Cross section

The intersection of a solid and a plane.

Lateral face

In a solid figure, faces that are not bases. \n

Lateral edge

The intersection of two lateral faces.

Base edge

The intersection of a lateral face and a base.

Altitude

A perpendicular segment that joins the planes of the bases.

Height

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The length of the altitude of a solid figure.

Lateral area

The sum of the areas of a figure not including the bases.

Axis

The segment with endpoints that are the centers of the bases of a cylinder

Composite solid

A three-dimensional figure that is composed of simpler figures

Regular pyramid

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A pyramid with a base that is a regular polygon.

Slant height

The height of a lateral side of a pyramid or cone.

Right cone

A cone with an axis that is also an altitude.

Oblique cone

A cone that is not a right cone.

Great circle

A circle formed when a plane intersects a sphere with its center at the center of the sphere.

Pole

The endpoints of a diameter of a great circle.

Hemisphere

One of the two congruent parts into which a great circle separates a sphere.

Euclidean geometry

A geometrical system in which a plane is a flat surface made up of points that extend infinitely in \n all directions.

Spherical geometry

The branch of geometry that deals with a system of points, great circles (lines), and spheres \n (planes).

Non euclidean geometry

The study of geometrical systems that are not in accordance with the Parallel Postulate of \n Euclidean geometry.

Similar solids

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(Blank) have exactly the same shape but not necessarily the same size.

Congruent solids

(Blank) have exactly the same shape and the same size.