| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
The dimensions of this cylinder are height (h) = 2 and radius (r) = 1. What is the volume?
| 8π | |
| 28π | |
| 32π | |
| 2π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(12 x 2)
v = 2π
The dimensions of this cube are height (h) = 4, length (l) = 2, and width (w) = 3. What is the surface area?
| 52 | |
| 136 | |
| 14 | |
| 114 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 2 x 3) + (2 x 3 x 4) + (2 x 2 x 4)
sa = (12) + (24) + (16)
sa = 52
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
|
supplementary, vertical |
|
acute, obtuse |
|
obtuse, acute |
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).
If a = 8, b = 8, c = 6, and d = 5, what is the perimeter of this quadrilateral?
| 24 | |
| 16 | |
| 17 | |
| 27 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 8 + 8 + 6 + 5
p = 27
Which of the following statements about math operations is incorrect?
you can add monomials that have the same variable and the same exponent |
|
all of these statements are correct |
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you can multiply monomials that have different variables and different exponents |
|
you can subtract monomials that have the same variable and the same exponent |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.