| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.51 |
| Score | 0% | 70% |
If the base of this triangle is 3 and the height is 2, what is the area?
| 27 | |
| 3 | |
| 30 | |
| 71\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 3 x 2 = \( \frac{6}{2} \) = 3
The dimensions of this cube are height (h) = 3, length (l) = 2, and width (w) = 1. What is the volume?
| 27 | |
| 6 | |
| 245 | |
| 90 |
The volume of a cube is height x length x width:
v = h x l x w
v = 3 x 2 x 1
v = 6
What is the area of a circle with a diameter of 10?
| 25π | |
| 7π | |
| 4π | |
| 81π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{10}{2} \)
r = 5
a = πr2
a = π(52)
a = 25π
The formula for the area of a circle is which of the following?
a = π d |
|
a = π d2 |
|
a = π r |
|
a = π r2 |
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.
Simplify (4a)(4ab) - (2a2)(9b).
| -2a2b | |
| 88a2b | |
| 34a2b | |
| 2ab2 |
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.
(4a)(4ab) - (2a2)(9b)
(4 x 4)(a x a x b) - (2 x 9)(a2 x b)
(16)(a1+1 x b) - (18)(a2b)
16a2b - 18a2b
-2a2b