| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 4.08 |
| Score | 0% | 82% |
If a = c = 7, b = d = 8, what is the area of this rectangle?
| 56 | |
| 54 | |
| 21 | |
| 12 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
The formula for the area of a circle is which of the following?
a = π r2 |
|
a = π d |
|
a = π d2 |
|
a = π r |
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.
A right angle measures:
90° |
|
360° |
|
180° |
|
45° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
What is 4a3 - 3a3?
| 1a3 | |
| 1 | |
| 12a3 | |
| 7 |
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.
4a3 - 3a3 = 1a3
If a = 8, b = 9, c = 6, and d = 4, what is the perimeter of this quadrilateral?
| 22 | |
| 17 | |
| 21 | |
| 27 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 8 + 9 + 6 + 4
p = 27