| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
On this circle, line segment AB is the:
radius |
|
chord |
|
circumference |
|
diameter |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
If the base of this triangle is 3 and the height is 2, what is the area?
| 48 | |
| 3 | |
| 84 | |
| 37\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 3 x 2 = \( \frac{6}{2} \) = 3
Solve for b:
8b + 2 < -6 - 8b
| b < 2 | |
| b < -2\(\frac{2}{3}\) | |
| b < -\(\frac{1}{2}\) | |
| b < \(\frac{2}{3}\) |
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 < sign and the answer on the other.
8b + 2 < -6 - 8b
8b < -6 - 8b - 2
8b + 8b < -6 - 2
16b < -8
b < \( \frac{-8}{16} \)
b < -\(\frac{1}{2}\)
What is the area of a circle with a radius of 3?
| 9π | |
| 7π | |
| 64π | |
| 4π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
Order the following types of angle from least number of degrees to most number of degrees.
right, obtuse, acute |
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acute, obtuse, right |
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right, acute, obtuse |
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acute, right, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.