| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.39 |
| Score | 0% | 48% |
The dimensions of this cylinder are height (h) = 1 and radius (r) = 4. What is the surface area?
| 4π | |
| 160π | |
| 40π | |
| 140π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(42) + 2π(4 x 1)
sa = 2π(16) + 2π(4)
sa = (2 x 16)π + (2 x 4)π
sa = 32π + 8π
sa = 40π
If angle a = 26° and angle b = 53° what is the length of angle c?
| 104° | |
| 101° | |
| 119° | |
| 89° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 26° - 53° = 101°
The formula for the area of a circle is which of the following?
c = π d |
|
c = π d2 |
|
c = π r |
|
c = π r2 |
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.
The endpoints of this line segment are at (-2, 4) and (2, -6). What is the slope of this line?
| -2\(\frac{1}{2}\) | |
| 1 | |
| 2\(\frac{1}{2}\) | |
| 3 |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 4) and (2, -6) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(-6.0) - (4.0)}{(2) - (-2)} \) = \( \frac{-10}{4} \)The dimensions of this cube are height (h) = 5, length (l) = 5, and width (w) = 1. What is the surface area?
| 70 | |
| 136 | |
| 112 | |
| 306 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 5 x 1) + (2 x 1 x 5) + (2 x 5 x 5)
sa = (10) + (10) + (50)
sa = 70