| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.38 |
| Score | 0% | 68% |
What is the area of a circle with a radius of 2?
| 16π | |
| 4π | |
| 8π | |
| 49π |
The formula for area is πr2:
a = πr2
a = π(22)
a = 4π
Which of the following is not true about both rectangles and squares?
the lengths of all sides are equal |
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the perimeter is the sum of the lengths of all four sides |
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all interior angles are right angles |
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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).
A quadrilateral is a shape with __________ sides.
3 |
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2 |
|
4 |
|
5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
What is the circumference of a circle with a diameter of 17?
| 6π | |
| 17π | |
| 8π | |
| 10π |
The formula for circumference is circle diameter x π:
c = πd
c = 17π
The endpoints of this line segment are at (-2, 1) and (2, -3). What is the slope of this line?
| -3 | |
| \(\frac{1}{2}\) | |
| -1 | |
| -1\(\frac{1}{2}\) |
The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, 1) and (2, -3) so the slope becomes:
m = \( \frac{\Delta y}{\Delta x} \) = \( \frac{(-3.0) - (1.0)}{(2) - (-2)} \) = \( \frac{-4}{4} \)