| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.93 |
| Score | 0% | 79% |
What is the area of a circle with a diameter of 6?
| 8π | |
| 9π | |
| 64π | |
| 2π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{6}{2} \)
r = 3
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 |
|
acute, right, obtuse |
|
right, acute, obtuse |
|
acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
If a = c = 4, b = d = 3, what is the area of this rectangle?
| 16 | |
| 6 | |
| 40 | |
| 12 |
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
Simplify 9a x 4b.
| 36a2b2 | |
| 13ab | |
| 36ab | |
| 36\( \frac{a}{b} \) |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
9a x 4b = (9 x 4) (a x b) = 36ab
If side x = 11cm, side y = 8cm, and side z = 14cm what is the perimeter of this triangle?
| 33cm | |
| 22cm | |
| 37cm | |
| 26cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 11cm + 8cm + 14cm = 33cm