| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.85 |
| Score | 0% | 57% |
If a = c = 9, b = d = 1, what is the area of this rectangle?
| 36 | |
| 9 | |
| 63 | |
| 10 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 9 x 1
a = 9
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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opposite sides and adjacent angles are equal |
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a parallelogram is a quadrilateral |
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).
If angle a = 22° and angle b = 32° what is the length of angle c?
| 50° | |
| 108° | |
| 65° | |
| 126° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 22° - 32° = 126°
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.
Solve -3a - 5a = 7a + 7y - 8 for a in terms of y.
| -\(\frac{7}{10}\)y + \(\frac{3}{10}\) | |
| \(\frac{1}{4}\)y - 2 | |
| -1\(\frac{1}{5}\)y + \(\frac{4}{5}\) | |
| 3\(\frac{2}{3}\)y + 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.
-3a - 5y = 7a + 7y - 8
-3a = 7a + 7y - 8 + 5y
-3a - 7a = 7y - 8 + 5y
-10a = 12y - 8
a = \( \frac{12y - 8}{-10} \)
a = \( \frac{12y}{-10} \) + \( \frac{-8}{-10} \)
a = -1\(\frac{1}{5}\)y + \(\frac{4}{5}\)