| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
If a = c = 5, b = d = 1, and the blue angle = 71°, what is the area of this parallelogram?
| 1 | |
| 12 | |
| 5 | |
| 14 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 5 x 1
a = 5
Which of the following is not required to define the slope-intercept equation for a line?
\({\Delta y \over \Delta x}\) |
|
y-intercept |
|
slope |
|
x-intercept |
A line on the coordinate grid can be defined by a slope-intercept equation: y = mx + b. For a given value of x, the value of y can be determined given the slope (m) and y-intercept (b) of the line. The slope of a line is change in y over change in x, \({\Delta y \over \Delta x}\), and the y-intercept is the y-coordinate where the line crosses the vertical y-axis.
If angle a = 20° and angle b = 48° what is the length of angle c?
| 112° | |
| 95° | |
| 101° | |
| 85° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 20° - 48° = 112°
If side x = 12cm, side y = 11cm, and side z = 15cm what is the perimeter of this triangle?
| 32cm | |
| 23cm | |
| 38cm | |
| 30cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 12cm + 11cm + 15cm = 38cm
The dimensions of this cylinder are height (h) = 9 and radius (r) = 4. What is the volume?
| 108π | |
| 45π | |
| 9π | |
| 144π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(42 x 9)
v = 144π