| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
On this circle, line segment CD is the:
chord |
|
radius |
|
circumference |
|
diameter |
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).
What is the circumference of a circle with a diameter of 12?
| 2π | |
| 7π | |
| 12π | |
| 15π |
The formula for circumference is circle diameter x π:
c = πd
c = 12π
Solve for b:
3b + 4 > 3 - 8b
| b > 3 | |
| b > \(\frac{1}{8}\) | |
| b > -\(\frac{1}{11}\) | |
| b > -1 |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
3b + 4 > 3 - 8b
3b > 3 - 8b - 4
3b + 8b > 3 - 4
11b > -1
b > \( \frac{-1}{11} \)
b > -\(\frac{1}{11}\)
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
division |
|
exponents |
|
pairs |
|
addition |
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.)
If a = c = 4, b = d = 5, and the blue angle = 80°, what is the area of this parallelogram?
| 36 | |
| 20 | |
| 54 | |
| 9 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 4 x 5
a = 20