| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
A right angle measures:
45° |
|
360° |
|
90° |
|
180° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
The dimensions of this cylinder are height (h) = 4 and radius (r) = 2. What is the volume?
| 98π | |
| 112π | |
| 16π | |
| 128π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(22 x 4)
v = 16π
The dimensions of this cube are height (h) = 8, length (l) = 4, and width (w) = 2. What is the volume?
| 567 | |
| 126 | |
| 48 | |
| 64 |
The volume of a cube is height x length x width:
v = h x l x w
v = 8 x 4 x 2
v = 64
A cylinder with a radius (r) and a height (h) has a surface area of:
4π r2 |
|
2(π r2) + 2π rh |
|
π r2h |
|
π r2h2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Simplify (8a)(6ab) - (5a2)(6b).
| 78a2b | |
| 154ab2 | |
| 18a2b | |
| 78ab2 |
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.
(8a)(6ab) - (5a2)(6b)
(8 x 6)(a x a x b) - (5 x 6)(a2 x b)
(48)(a1+1 x b) - (30)(a2b)
48a2b - 30a2b
18a2b