| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.43 |
| Score | 0% | 69% |
What is the area of a circle with a radius of 3?
| 49π | |
| 9π | |
| 5π | |
| 8π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
The formula for the area of a circle is which of the following?
c = π r2 |
|
c = π r |
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c = π d |
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c = π d2 |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
On this circle, line segment AB is the:
chord |
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radius |
|
diameter |
|
circumference |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Simplify 6a x 6b.
| 12ab | |
| 36\( \frac{b}{a} \) | |
| 36a2b2 | |
| 36ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
6a x 6b = (6 x 6) (a x b) = 36ab
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
addition |
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pairs |
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exponents |
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division |
When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)