| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.41 |
| Score | 0% | 68% |
If a = 3, b = 5, c = 1, and d = 6, what is the perimeter of this quadrilateral?
| 15 | |
| 14 | |
| 18 | |
| 21 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 3 + 5 + 1 + 6
p = 15
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).
If a = c = 9, b = d = 5, and the blue angle = 57°, what is the area of this parallelogram?
| 45 | |
| 24 | |
| 16 | |
| 36 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 9 x 5
a = 45
On this circle, a line segment connecting point A to point D is called:
radius |
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diameter |
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chord |
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circumference |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
What is 8a - 7a?
| 15a2 | |
| 1a | |
| a2 | |
| 15 |
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.
8a - 7a = 1a