| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.84 |
| Score | 0% | 57% |
If angle a = 58° and angle b = 56° what is the length of angle c?
| 86° | |
| 97° | |
| 66° | |
| 110° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 58° - 56° = 66°
The formula for the area of a circle is which of the following?
c = π d2 |
|
c = π r |
|
c = π r2 |
|
c = π d |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Solve 9b - 3b = -8b - 4y + 9 for b in terms of y.
| 16y + 2 | |
| -5\(\frac{1}{2}\)y + 2 | |
| -\(\frac{1}{17}\)y + \(\frac{9}{17}\) | |
| -\(\frac{1}{2}\)y + 3\(\frac{1}{2}\) |
To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.
9b - 3y = -8b - 4y + 9
9b = -8b - 4y + 9 + 3y
9b + 8b = -4y + 9 + 3y
17b = -y + 9
b = \( \frac{-y + 9}{17} \)
b = \( \frac{-y}{17} \) + \( \frac{9}{17} \)
b = -\(\frac{1}{17}\)y + \(\frac{9}{17}\)
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
|
right, acute, obtuse |
|
acute, right, obtuse |
|
acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
If a = c = 6, b = d = 8, what is the area of this rectangle?
| 32 | |
| 15 | |
| 21 | |
| 48 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 6 x 8
a = 48