| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.99 |
| Score | 0% | 60% |
If angle a = 38° and angle b = 56° what is the length of angle c?
| 103° | |
| 86° | |
| 68° | |
| 96° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 38° - 56° = 86°
Solve for z:
-z - 8 = 9 + 4z
| -3\(\frac{2}{5}\) | |
| -1\(\frac{1}{6}\) | |
| \(\frac{4}{5}\) | |
| \(\frac{1}{3}\) |
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.
-z - 8 = 9 + 4z
-z = 9 + 4z + 8
-z - 4z = 9 + 8
-5z = 17
z = \( \frac{17}{-5} \)
z = -3\(\frac{2}{5}\)
Which of the following expressions contains exactly two terms?
polynomial |
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quadratic |
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binomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
The formula for the area of a circle is which of the following?
c = π r2 |
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c = π r |
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c = π d |
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c = 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.
Which of the following is not true about both rectangles and squares?
all interior angles are right angles |
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the perimeter is the sum of the lengths of all four sides |
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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).