| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.53 |
| Score | 0% | 71% |
The dimensions of this cylinder are height (h) = 7 and radius (r) = 1. What is the volume?
| 7π | |
| 64π | |
| 5π | |
| 324π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(12 x 7)
v = 7π
The formula for the area of a circle is which of the following?
a = π r |
|
a = π r2 |
|
a = π d |
|
a = π d2 |
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.
What is the circumference of a circle with a radius of 14?
| 8π | |
| 28π | |
| 22π | |
| 12π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 14)
c = 28π
If a = c = 3, b = d = 7, what is the area of this rectangle?
| 63 | |
| 21 | |
| 14 | |
| 25 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 3 x 7
a = 21
Which of the following is not true about both rectangles and squares?
all interior angles are right angles |
|
the area is length x width |
|
the perimeter is the sum of the lengths of all four sides |
|
the lengths of all sides are equal |
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).