| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.68 |
| Score | 0% | 54% |
On this circle, line segment CD is the:
radius |
|
diameter |
|
chord |
|
circumference |
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).
On this circle, a line segment connecting point A to point D is called:
chord |
|
radius |
|
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).
Solve 9a + 4a = -6a + 9x + 8 for a in terms of x.
| \(\frac{11}{13}\)x - \(\frac{4}{13}\) | |
| \(\frac{1}{3}\)x + \(\frac{8}{15}\) | |
| \(\frac{1}{2}\)x - \(\frac{1}{3}\) | |
| \(\frac{7}{9}\)x + \(\frac{7}{9}\) |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
9a + 4x = -6a + 9x + 8
9a = -6a + 9x + 8 - 4x
9a + 6a = 9x + 8 - 4x
15a = 5x + 8
a = \( \frac{5x + 8}{15} \)
a = \( \frac{5x}{15} \) + \( \frac{8}{15} \)
a = \(\frac{1}{3}\)x + \(\frac{8}{15}\)
What is the circumference of a circle with a diameter of 10?
| 14π | |
| 11π | |
| 8π | |
| 10π |
The formula for circumference is circle diameter x π:
c = πd
c = 10π
On this circle, line segment AB is the:
circumference |
|
chord |
|
radius |
|
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).