# Basic math glossary-S

Basic math glossary-S define words beginning with the letter S

Sale price: Price paid for an item after the price is reduced.

Sales tax: Tax paid when bying an item.

Scale: The ratio of the actual size to the size on a map.

Scale drawing: Shrinking or enlarging the actual size of an object.

Scalene triangle: A triangle with no equal sides.

Scattergram: Also known as scatter plot, it is the set of points plotted on a coordinate system whose coordinates represent the values of two variables.

Scientific notation: A number between one and 10 multiplied by a power of ten

Secant of a circle: A line that intersects a circle in exactly two points

Sector: A part of a circle bounded by two radii.

Segment: A line with a beginning point and an endpoint.

Simplest form: A fraction in which the numerator and the denominator have been reduced until there is no common factor bigger than one between them.

Simplify: To express in simplest form.

Skew lines: Lines in space that are not on the same plane (or are not coplanar) and never meet.

Sphere: A solid figure that has a curved surface like a soccer ball in which all points on the surface are at the same distance from the center. Examples of sphere are the earth, a soccer ball, a ping pong ball, etc...

Sprocket: A wheel that has teeth and pulling a chain.

Square: A rectangle with 4 equal sides.

Square unit: A measure of area.

Straight angle: An angle that measures 180 degrees. A straight angle looks like a straight line

Subtraction: The arithmetic operation of taking away an amount from another to get the difference.

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1. ### Average age word problem

Aug 09, 16 01:40 PM

Average age of Dipu and Apu is 22 years. Average age of Dipu and Tipu is 24 years. Age of Dipu is 21 years. What are the ages of Apu, and tipu ? Let