Central Angle

Definition- an angle formed by 2 radii with the vertex (2 lines meet or point) at the centre of a circle. 

Diameter

Definition- it's the distance across a circle through its center.

Radius

Definition- The distance from the center of a circle to its outer edge. (Plural is Radii)

Parallel Lines

Definition- lines in the same place that never cross or intersect.

What are the formulas we use to get the area and circumference of a circle?

1. D=2r.
2. D/2=R.
3. C=2πr.
4. A=πr(squared).
5. C=πd. 

What does Constant mean in Math?

For more understanding, go here.

What does Variable mean in Math?

For more info, go here.

What is a Mixed number?

A mixed number is made up of a whole number and a fraction such as:


To learn more, go here.

What does Expression mean in Math?

What does Numerical Coefficient mean?

Adding Fractions with unlike denominators.

Need more help with how to subtract fractions with unlike denominators? click here.
Need more help with how to add fractions with unlike denominators? click here.

Adding Fractions with Common Denominators.

When adding fractions with the same denominator, all you have to do is add the numerator and place the sum on top of the denominator.



For more learning and understanding go to this link.
To simplify a fraction, go to this link.

How to find 75% of 124.

Steps I did to find the answer.

1. Make a ratio table.

2. Put the percent sign on the left column and the number sign on the right column. (%, #)

3. To make things easy, you should always start with 100 under the % and whatever number it is under the #.

4. Find an easy number to start of with like, divide 100 by then.

IMPORTANT RULE: Whatever you do to the right, you do to the left.

5. You can divide it or multiply it to get the answer, but you can't subtract.

6. You can also add the numbers you get when you divide or multiply, but you'll have to do the same thing to the other side.

Converting fractions to decimals

To learn more click here.

If you think you need more practice click here.

Order of Operations.

Check out this site for more understanding about the Order of Operations.