| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
Which of the following statements about a parallelogram is not true?
a parallelogram is a quadrilateral |
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opposite sides and adjacent angles are equal |
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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 |
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 y:
-8y + 8 = \( \frac{y}{1} \)
| \(\frac{8}{9}\) | |
| \(\frac{21}{62}\) | |
| -1\(\frac{2}{25}\) | |
| -\(\frac{1}{10}\) |
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 equal sign and the answer on the other.
-8y + 8 = \( \frac{y}{1} \)
1 x (-8y + 8) = y
(1 x -8y) + (1 x 8) = y
-8y + 8 = y
-8y + 8 - y = 0
-8y - y = -8
-9y = -8
y = \( \frac{-8}{-9} \)
y = \(\frac{8}{9}\)
Which types of triangles will always have at least two sides of equal length?
equilateral and isosceles |
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equilateral and right |
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isosceles and right |
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equilateral, isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
If a = 6, b = 8, c = 5, and d = 5, what is the perimeter of this quadrilateral?
| 18 | |
| 21 | |
| 24 | |
| 25 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 6 + 8 + 5 + 5
p = 24
What is the circumference of a circle with a radius of 12?
| 20π | |
| 24π | |
| 16π | |
| 17π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 12)
c = 24π