| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.22 |
| Score | 0% | 64% |
What is 4a8 + 5a8?
| -1 | |
| -a16 | |
| 9a8 | |
| 20a16 |
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.
4a8 + 5a8 = 9a8
A trapezoid is a quadrilateral with one set of __________ sides.
right angle |
|
equal angle |
|
equal length |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
A(n) __________ is to a parallelogram as a square is to a rectangle.
triangle |
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rhombus |
|
quadrilateral |
|
trapezoid |
A rhombus is a parallelogram with four equal-length sides. A square is a rectangle with four equal-length sides.
If a = c = 6, b = d = 5, and the blue angle = 58°, what is the area of this parallelogram?
| 30 | |
| 42 | |
| 18 | |
| 6 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 5
a = 30
Which of the following is not true about both rectangles and squares?
all interior angles are right angles |
|
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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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).