| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.70 |
| Score | 0% | 74% |
If a = 9, b = 7, c = 1, and d = 4, what is the perimeter of this quadrilateral?
| 29 | |
| 26 | |
| 15 | |
| 21 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 9 + 7 + 1 + 4
p = 21
A right angle measures:
360° |
|
180° |
|
45° |
|
90° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
Solve for a:
-6a + 6 = -8 - 5a
| 1\(\frac{2}{3}\) | |
| -2 | |
| 1\(\frac{2}{5}\) | |
| 14 |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
-6a + 6 = -8 - 5a
-6a = -8 - 5a - 6
-6a + 5a = -8 - 6
-a = -14
a = \( \frac{-14}{-1} \)
a = 14
A cylinder with a radius (r) and a height (h) has a surface area of:
2(π r2) + 2π rh |
|
π r2h2 |
|
4π r2 |
|
π r2h |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
If BD = 14 and AD = 21, AB = ?
| 7 | |
| 3 | |
| 5 | |
| 10 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BD