| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
If a = c = 8, b = d = 2, and the blue angle = 59°, what is the area of this parallelogram?
| 16 | |
| 12 | |
| 7 | |
| 9 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 8 x 2
a = 16
A(n) __________ is two expressions separated by an equal sign.
expression |
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formula |
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problem |
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equation |
An equation is two expressions separated by an equal sign. The key to solving equations is to 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.
What is the circumference of a circle with a diameter of 19?
| 19π | |
| 14π | |
| 6π | |
| 3π |
The formula for circumference is circle diameter x π:
c = πd
c = 19π
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
lw x wh + lh |
|
h x l x w |
|
h2 x l2 x w2 |
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2lw x 2wh + 2lh |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.
If angle a = 41° and angle b = 55° what is the length of angle d?
| 129° | |
| 113° | |
| 139° | |
| 132° |
An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite:
d° = b° + c°
To find angle c, remember that the sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 41° - 55° = 84°
So, d° = 55° + 84° = 139°
A shortcut to get this answer is to remember that angles around a line add up to 180°:
a° + d° = 180°
d° = 180° - a°
d° = 180° - 41° = 139°