| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
If angle a = 36° and angle b = 33° what is the length of angle c?
| 111° | |
| 109° | |
| 132° | |
| 116° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 36° - 33° = 111°
What is 3a2 - 2a2?
| 1a2 | |
| 1 | |
| 5 | |
| a4 |
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.
3a2 - 2a2 = 1a2
The dimensions of this cylinder are height (h) = 5 and radius (r) = 3. What is the volume?
| 441π | |
| 16π | |
| 45π | |
| 25π |
The volume of a cylinder is πr2h:
v = πr2h
v = π(32 x 5)
v = 45π
Which of the following is not true about both rectangles and squares?
the perimeter is the sum of the lengths of all four sides |
|
all interior angles are right angles |
|
the lengths of all sides are equal |
|
the area is length x width |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
If a = c = 2, b = d = 6, what is the area of this rectangle?
| 12 | |
| 4 | |
| 81 | |
| 36 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 2 x 6
a = 12