Surface of area

4. The difference is the answer to a subtraction problem, in which one number is taken away from another.
5. This word means "to calculate the numerical value".
8. Angle: An angle whose measure is between 0° and 90° or with less than 90° (or pi/2) radians.
10. , Fractions with the same denominator.
14. Common Factor: The largest number common to each set of factors that divides both numbers exactly. The greatest common factor of 10 and 20 is 10.
15. A term used to describe a shape whose sides are all of equal length.
16. A statement that shows the equality of two expressions by joining them with an equals sign.
18. Number A number that can be divided or is divisible by 2.
19. Two rays sharing the same endpoint (called the angle vertex).

1. The mean is the same as the average
2. A number that cannot be represented as a decimal or fraction. A number like pi is irrational because it contains an infinite number of digits that keep repeating. Many square roots are also irrational numbers.
3. The branch of mathematics that substitutes letters for numbers to solve for unknown values.
6. All whole numbers, positive or negative, including zero.
7. The study of lines, angles, shapes, and their properties. Geometry studies physical shapes and the object dimensions.
8. Value: Always a positive number, absolute value refers to the distance of a number from 0. ,
9. Bisector: The line dividing an angle into two equal angles.
11. The two-dimensional space taken up by an object or shape, given in square units.
12. Terms Terms with the same variable and same exponents/powers.
13. Two-dimensional shapes.
17. A polygon with two sides of equal length.