| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.81 |
| Score | 0% | 76% |
What is the area of a circle with a diameter of 8?
| 16π | |
| 4π | |
| 3π | |
| 6π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{8}{2} \)
r = 4
a = πr2
a = π(42)
a = 16π
The formula for the area of a circle is which of the following?
a = π r2 |
|
a = π d |
|
a = π d2 |
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a = π r |
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.
A right angle measures:
45° |
|
180° |
|
90° |
|
360° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
The dimensions of this cylinder are height (h) = 3 and radius (r) = 8. What is the volume?
| 192π | |
| 144π | |
| 147π | |
| 256π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(82 x 3)
v = 192π
To multiply binomials, use the FOIL method. Which of the following is not a part of the FOIL method?
Inside |
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First |
|
Last |
|
Odd |
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.