| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.00 |
| Score | 0% | 60% |
Which of the following statements about a parallelogram is not true?
a parallelogram is a quadrilateral |
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the area of a parallelogram is base x height |
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the perimeter of a parallelogram is the sum of the lengths of all sides |
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opposite sides and adjacent angles are equal |
A parallelogram is a quadrilateral with two sets of parallel sides. Opposite sides (a = c, b = d) and angles (red = red, blue = blue) are equal. The area of a parallelogram is base x height and the perimeter is the sum of the lengths of all sides (a + b + c + d).
The formula for the area of a circle is which of the following?
a = π r2 |
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a = π d2 |
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a = π d |
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a = π r |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Solve b - 2b = -8b - z - 5 for b in terms of z.
| -\(\frac{1}{10}\)z + \(\frac{3}{5}\) | |
| \(\frac{1}{4}\)z + 1\(\frac{1}{8}\) | |
| z - \(\frac{7}{15}\) | |
| \(\frac{1}{9}\)z - \(\frac{5}{9}\) |
To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.
b - 2z = -8b - z - 5
b = -8b - z - 5 + 2z
b + 8b = -z - 5 + 2z
9b = z - 5
b = \( \frac{z - 5}{9} \)
b = \( \frac{z}{9} \) + \( \frac{-5}{9} \)
b = \(\frac{1}{9}\)z - \(\frac{5}{9}\)
For this diagram, the Pythagorean theorem states that b2 = ?
c2 + a2 |
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c - a |
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a2 - c2 |
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c2 - a2 |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)
A quadrilateral is a shape with __________ sides.
4 |
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3 |
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2 |
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5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.