Geometric Book Chantiuna Meadows 4-9-13 Obj:. Angle Two rays sharing a common endpoint. Angles are typically measured i n degrees or radians.

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Presentation transcript:

Geometric Book Chantiuna Meadows Obj:

Angle Two rays sharing a common endpoint. Angles are typically measured i n degrees or radians.

Cone A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve. Often the word cone refers to a right circular cone.

Diameter A line segment between two points on the circle or sphere which passes through the center. The word diameter is also refers to the length of this line segment.

Disk The union of a circle and its interiorinterior

Heptagon A polygon with seven sides. Some authors also use the name septagon instead of heptagon.polygonsides

Hexagon A polygon with six sides.polygon

Kite A quadrilateral w ith two pairs of adjacent sides that are congruent. Note that the diagonals of a kite are perpendicular.quadrilateraladjacentsidescongruentdiagonals perpendicular

Oval An egg- shaped curve. Note: An oval is not the same as an ellipse.

Parallelogram A quadrilat eral with two pairs of parallel sides.

Pentagon A polygon with five sides.

Pyramid A polyhedron wi th a polygonal base and lateral faces that taper to an apex. A pyramid with a triangular base is called a tetrahedron.

Rectangle A box shape on a plane. Formally, a rectangle is a quadrilateral with four congruent angles (all 90°).

Radius A line segment between the center and a point on the circle or sphere. The word radius also refers to the length of this segment.

Ray A part of a line starting at a particular point and extending infinit ely in one direction.

Reflection A transformation in which a geometric figure is reflected a cross a line, creating a mirror image. That line is called the axis of reflection.

Rhombus A parallelogram with four congruent sides. Note that the diagonals of a rhombus are perpendicular (as is the case with all kites).

Similar Identical in shape, although not necessarily the same size.

Square A rectangle with all four sides of equal length. Formally, a square is a quadrilateral with four congruent sides and four congruent angles (all 90°).

Polygon A closed plane figure for which all sides are line segments. The name of a polygon describes the number of sides. A polygon which has all sides mutually cong ruent and all angles mutually congruent is called a rectangle polygon.

Triangle A polygon with three sides.