| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.79 |
| Score | 0% | 76% |
What is the circumference of a circle with a radius of 13?
| 12π | |
| 10π | |
| 26π | |
| 14π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 13)
c = 26π
If a = c = 3, b = d = 7, what is the area of this rectangle?
| 9 | |
| 21 | |
| 1 | |
| 7 |
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
The dimensions of this cube are height (h) = 8, length (l) = 2, and width (w) = 1. What is the volume?
| 189 | |
| 225 | |
| 16 | |
| 9 |
The volume of a cube is height x length x width:
v = h x l x w
v = 8 x 2 x 1
v = 16
What is 5a6 + 5a6?
| 10a6 | |
| 25a6 | |
| a612 | |
| 0 |
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.
5a6 + 5a6 = 10a6
If angle a = 59° and angle b = 60° what is the length of angle c?
| 61° | |
| 83° | |
| 69° | |
| 98° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 59° - 60° = 61°