| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.28 |
| Score | 0% | 66% |
Which of the following statements about a parallelogram is not true?
the perimeter of a parallelogram is the sum of the lengths of all sides |
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the area of a parallelogram is base x height |
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a parallelogram is a quadrilateral |
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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).
Solve for z:
z + 1 > \( \frac{z}{9} \)
| z > 3 | |
| z > -\(\frac{30}{41}\) | |
| z > -1\(\frac{1}{8}\) | |
| z > -5\(\frac{2}{5}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
z + 1 > \( \frac{z}{9} \)
9 x (z + 1) > z
(9 x z) + (9 x 1) > z
9z + 9 > z
9z + 9 - z > 0
9z - z > -9
8z > -9
z > \( \frac{-9}{8} \)
z > -1\(\frac{1}{8}\)
What is the area of a circle with a radius of 2?
| 81π | |
| 64π | |
| 49π | |
| 4π |
The formula for area is πr2:
a = πr2
a = π(22)
a = 4π
The formula for the area of a circle is which of the following?
a = π r2 |
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a = π r |
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a = π d |
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a = π d2 |
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.
A quadrilateral is a shape with __________ sides.
3 |
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5 |
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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.