| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
If a = c = 2, b = d = 6, what is the area of this rectangle?
| 18 | |
| 3 | |
| 12 | |
| 16 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 2 x 6
a = 12
What is 9a9 - 8a9?
| 1a9 | |
| 72a9 | |
| 1 | |
| a18 |
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.
9a9 - 8a9 = 1a9
The dimensions of this cylinder are height (h) = 1 and radius (r) = 6. What is the volume?
| 27π | |
| 64π | |
| 32π | |
| 36π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(62 x 1)
v = 36π
Which of the following is not true about both rectangles and squares?
the perimeter is the sum of the lengths of all four sides |
|
all interior angles are right angles |
|
the lengths of all sides are equal |
|
the area is length x width |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
What is the area of a circle with a radius of 4?
| 16π | |
| 2π | |
| 4π | |
| 49π |
The formula for area is πr2:
a = πr2
a = π(42)
a = 16π