| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
If a = c = 9, b = d = 3, and the blue angle = 75°, what is the area of this parallelogram?
| 56 | |
| 27 | |
| 9 | |
| 14 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 9 x 3
a = 27
Which of the following is not true about both rectangles and squares?
the lengths of all sides are equal |
|
all interior angles are right angles |
|
the area is length x width |
|
the perimeter is the sum of the lengths of all four sides |
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).
The dimensions of this cylinder are height (h) = 2 and radius (r) = 1. What is the volume?
| 75π | |
| 343π | |
| 2π | |
| 80π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(12 x 2)
v = 2π
If side x = 6cm, side y = 15cm, and side z = 12cm what is the perimeter of this triangle?
| 22cm | |
| 33cm | |
| 29cm | |
| 30cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 6cm + 15cm + 12cm = 33cm
Solve for b:
-3b - 7 = 5 + 2b
| -2\(\frac{2}{5}\) | |
| \(\frac{1}{2}\) | |
| -\(\frac{2}{7}\) | |
| -1\(\frac{1}{4}\) |
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 equal sign and the answer on the other.
-3b - 7 = 5 + 2b
-3b = 5 + 2b + 7
-3b - 2b = 5 + 7
-5b = 12
b = \( \frac{12}{-5} \)
b = -2\(\frac{2}{5}\)