| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.42 |
| Score | 0% | 68% |
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
|
right, acute, obtuse |
|
acute, obtuse, right |
|
acute, right, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
What is the circumference of a circle with a diameter of 19?
| 19π | |
| 10π | |
| 2π | |
| 16π |
The formula for circumference is circle diameter x π:
c = πd
c = 19π
If a = c = 4, b = d = 3, what is the area of this rectangle?
| 5 | |
| 12 | |
| 4 | |
| 3 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 4 x 3
a = 12
Factor y2 - 2y - 8
| (y + 4)(y + 2) | |
| (y + 4)(y - 2) | |
| (y - 4)(y + 2) | |
| (y - 4)(y - 2) |
To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce -8 as well and sum (Inside, Outside) to equal -2. For this problem, those two numbers are -4 and 2. Then, plug these into a set of binomials using the square root of the First variable (y2):
y2 - 2y - 8
y2 + (-4 + 2)y + (-4 x 2)
(y - 4)(y + 2)
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
obtuse, acute |
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acute, obtuse |
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supplementary, vertical |
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vertical, supplementary |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).