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A method of countign tghat is used to keep tarck of responses in statistical surveys: 4 is talled as ////, or , five is talled as or .

A covering or tiling of the plane with non overlapping shapes. Regular tessellations are made with regular polygons.

A four-sided polygon.

The measure of an angle as compared to a horizontal line. (Also what happens when you kick the pinball machine too hard!).

A 3-D figure formed by rolling a rectangle into a cylinder and bending the cylinder until its bases meet.

See Slide.

A line that intersects two other lines.

A quadrilateral with two parallel sides.

A diagram used in many circumstances; for example in statistics it represents a systematic way of determining all possible outcomes of an experiment.

A three sided polygon.

Right triangle: when one angle is 90°.

Equilateral triangle: all angles are 60°, all sides have
equal length.

Isosceles triangle: a triangle with two sides of equal
length.

Scalene triangle: a triangle with three different sides and
angles.

Acute triangle: a traingle where all angles are less than
90°.

Obtuse triangle: a triangle with one angle that is more
than 90°.

To divide a polygon into triangles.

A 13-sided polygon.

The same as triangle.

Basic elements: sine, cosine, tangent, cotangent, secant, cosecant.

A polynomial with three addends.

copyright 2000 et seq. maddalena falanga & luciano battaia

first published on september 01 2003 - last updated on september 01
2003