| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
Which of the following is not required to define the slope-intercept equation for a line?
y-intercept |
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\({\Delta y \over \Delta x}\) |
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slope |
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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.
Which of the following is not true about both rectangles and squares?
the lengths of all sides are equal |
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all interior angles are right angles |
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the area is length x width |
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the perimeter is the sum of the lengths of all four sides |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
A coordinate grid is composed of which of the following?
origin |
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y-axis |
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all of these |
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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.
If side x = 9cm, side y = 13cm, and side z = 10cm what is the perimeter of this triangle?
| 32cm | |
| 26cm | |
| 24cm | |
| 28cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 9cm + 13cm + 10cm = 32cm
If a = c = 1, b = d = 6, and the blue angle = 56°, what is the area of this parallelogram?
| 18 | |
| 6 | |
| 30 | |
| 12 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 1 x 6
a = 6