| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.04 |
| Score | 0% | 61% |
If the base of this triangle is 9 and the height is 6, what is the area?
| 27 | |
| 60 | |
| 65 | |
| 20 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 9 x 6 = \( \frac{54}{2} \) = 27
Which of the following is not true about both rectangles and squares?
the perimeter is the sum of the lengths of all four sides |
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the area is length x width |
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all interior angles are right angles |
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the lengths of all sides are equal |
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 quadrilateral is a shape with __________ sides.
4 |
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3 |
|
2 |
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5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
The dimensions of this trapezoid are a = 4, b = 3, c = 5, d = 4, and h = 2. What is the area?
| 15 | |
| 30 | |
| 25 | |
| 7 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(3 + 4)(2)
a = ½(7)(2)
a = ½(14) = \( \frac{14}{2} \)
a = 7
Which of the following is not required to define the slope-intercept equation for a line?
y-intercept |
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x-intercept |
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\({\Delta y \over \Delta x}\) |
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slope |
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.