| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.89 |
| Score | 0% | 58% |
The dimensions of this trapezoid are a = 5, b = 4, c = 8, d = 2, and h = 3. What is the area?
| 22\(\frac{1}{2}\) | |
| 9 | |
| 6 | |
| 10\(\frac{1}{2}\) |
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(4 + 2)(3)
a = ½(6)(3)
a = ½(18) = \( \frac{18}{2} \)
a = 9
If a = -2 and z = 8, what is the value of -7a(a - z)?
| -72 | |
| -14 | |
| -140 | |
| 168 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-7a(a - z)
-7(-2)(-2 - 8)
-7(-2)(-10)
(14)(-10)
-140
The endpoints of this line segment are at (-2, 0) and (2, 8). What is the slope of this line?
| 2 | |
| \(\frac{1}{2}\) | |
| -3 | |
| -2\(\frac{1}{2}\) |
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, 0) and (2, 8) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(8.0) - (0.0)}{(2) - (-2)} \) = \( \frac{8}{4} \)This diagram represents two parallel lines with a transversal. If d° = 165, what is the value of a°?
| 23 | |
| 15 | |
| 31 | |
| 32 |
For parallel lines with a transversal, the following relationships apply:
Applying these relationships starting with d° = 165, the value of a° is 15.
A(n) __________ is to a parallelogram as a square is to a rectangle.
trapezoid |
|
triangle |
|
rhombus |
|
quadrilateral |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.