| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.53 |
| Score | 0% | 51% |
The dimensions of this cylinder are height (h) = 7 and radius (r) = 2. What is the volume?
| 28π | |
| 63π | |
| 49π | |
| 128π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(22 x 7)
v = 28π
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
|
equilateral, isosceles and right |
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isosceles and right |
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equilateral and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
obtuse, acute |
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supplementary, vertical |
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vertical, supplementary |
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acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
The formula for the area of a circle is which of the following?
c = π r |
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c = π d |
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c = π d2 |
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c = 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.
Solve for a:
9a - 7 < -8 - 8a
| a < -1 | |
| a < -\(\frac{1}{17}\) | |
| a < -\(\frac{1}{9}\) | |
| a < \(\frac{1}{2}\) |
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.
9a - 7 < -8 - 8a
9a < -8 - 8a + 7
9a + 8a < -8 + 7
17a < -1
a < \( \frac{-1}{17} \)
a < -\(\frac{1}{17}\)