| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.01 |
| Score | 0% | 60% |
The dimensions of this cube are height (h) = 2, length (l) = 3, and width (w) = 7. What is the surface area?
| 198 | |
| 82 | |
| 104 | |
| 102 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 3 x 7) + (2 x 7 x 2) + (2 x 3 x 2)
sa = (42) + (28) + (12)
sa = 82
Which types of triangles will always have at least two sides of equal length?
equilateral and right |
|
equilateral, isosceles and right |
|
equilateral and isosceles |
|
isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
What is the circumference of a circle with a diameter of 12?
| 2π | |
| 12π | |
| 10π | |
| 18π |
The formula for circumference is circle diameter x π:
c = πd
c = 12π
Simplify (3a)(3ab) + (7a2)(3b).
| 12a2b | |
| -12a2b | |
| 30a2b | |
| 60ab2 |
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.
(3a)(3ab) + (7a2)(3b)
(3 x 3)(a x a x b) + (7 x 3)(a2 x b)
(9)(a1+1 x b) + (21)(a2b)
9a2b + 21a2b
30a2b
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
|
obtuse, acute |
|
vertical, supplementary |
|
acute, obtuse |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).