| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.45 |
| Score | 0% | 69% |
Which of the following is not true about both rectangles and squares?
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 |
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the lengths of all sides are equal |
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).
Solve -8a - 3a = -9a + 5z - 5 for a in terms of z.
| 8z - 5 | |
| -\(\frac{5}{16}\)z + \(\frac{3}{8}\) | |
| \(\frac{9}{11}\)z + \(\frac{3}{11}\) | |
| 3z + 1 |
To solve this equation, isolate the variable for which you are solving (a) on one side of the equation and put everything else on the other side.
-8a - 3z = -9a + 5z - 5
-8a = -9a + 5z - 5 + 3z
-8a + 9a = 5z - 5 + 3z
a = 8z - 5
A trapezoid is a quadrilateral with one set of __________ sides.
equal angle |
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equal length |
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right angle |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
If side x = 8cm, side y = 7cm, and side z = 7cm what is the perimeter of this triangle?
| 25cm | |
| 22cm | |
| 31cm | |
| 32cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 8cm + 7cm + 7cm = 22cm
A quadrilateral is a shape with __________ sides.
5 |
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3 |
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4 |
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2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.