| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
What is the area of a circle with a radius of 2?
| 4π | |
| 49π | |
| 8π | |
| 3π |
The formula for area is πr2:
a = πr2
a = π(22)
a = 4π
A cylinder with a radius (r) and a height (h) has a surface area of:
2(π r2) + 2π rh |
|
4π r2 |
|
π r2h |
|
π r2h2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Order the following types of angle from least number of degrees to most number of degrees.
acute, obtuse, right |
|
acute, right, obtuse |
|
right, acute, obtuse |
|
right, obtuse, acute |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
What is 3a2 + 5a2?
| 8a2 | |
| -2a4 | |
| 8a4 | |
| a24 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a2 + 5a2 = 8a2
The dimensions of this cube are height (h) = 5, length (l) = 9, and width (w) = 3. What is the volume?
| 288 | |
| 135 | |
| 72 | |
| 24 |
The volume of a cube is height x length x width:
v = h x l x w
v = 5 x 9 x 3
v = 135