| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
What is 3a + 4a?
| 7a | |
| 7 | |
| 12a | |
| 7a2 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a + 4a = 7a
If a = 8, b = 9, c = 8, and d = 3, what is the perimeter of this quadrilateral?
| 25 | |
| 13 | |
| 24 | |
| 28 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 8 + 9 + 8 + 3
p = 28
On this circle, a line segment connecting point A to point D is called:
diameter |
|
circumference |
|
radius |
|
chord |
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).
The formula for the area of a circle is which of the following?
c = π r |
|
c = π d2 |
|
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.
A quadrilateral is a shape with __________ sides.
5 |
|
4 |
|
3 |
|
2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.