| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.71 |
| Score | 0% | 74% |
What is the circumference of a circle with a diameter of 8?
| 5π | |
| 8π | |
| 12π | |
| 28π |
The formula for circumference is circle diameter x π:
c = πd
c = 8π
The formula for the area of a circle is which of the following?
a = π r |
|
a = π d2 |
|
a = π d |
|
a = π r2 |
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.
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
First |
|
Odd |
|
Inside |
|
Last |
To multiply binomials, use the FOIL method. FOIL stands for First, Outside, Inside, Last and refers to the position of each term in the parentheses.
If a = 9, b = 5, c = 5, and d = 6, what is the perimeter of this quadrilateral?
| 7 | |
| 25 | |
| 17 | |
| 27 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 9 + 5 + 5 + 6
p = 25
The dimensions of this trapezoid are a = 6, b = 8, c = 7, d = 9, and h = 4. What is the area?
| 20 | |
| 12 | |
| 9 | |
| 34 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(8 + 9)(4)
a = ½(17)(4)
a = ½(68) = \( \frac{68}{2} \)
a = 34