| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
The formula for the area of a circle is which of the following?
a = π d |
|
a = π r |
|
a = π r2 |
|
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.
If a = 9, b = 8, c = 7, and d = 3, what is the perimeter of this quadrilateral?
| 22 | |
| 29 | |
| 12 | |
| 27 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 9 + 8 + 7 + 3
p = 27
The dimensions of this cylinder are height (h) = 3 and radius (r) = 3. What is the volume?
| 9π | |
| 27π | |
| 112π | |
| 20π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(32 x 3)
v = 27π
If angle a = 68° and angle b = 58° what is the length of angle d?
| 141° | |
| 112° | |
| 140° | |
| 147° |
An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite:
d° = b° + c°
To find angle c, remember that the sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 68° - 58° = 54°
So, d° = 58° + 54° = 112°
A shortcut to get this answer is to remember that angles around a line add up to 180°:
a° + d° = 180°
d° = 180° - a°
d° = 180° - 68° = 112°
A coordinate grid is composed of which of the following?
origin |
|
all of these |
|
y-axis |
|
x-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.