| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Which of the following statements about a triangle is not true?
exterior angle = sum of two adjacent interior angles |
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area = ½bh |
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perimeter = sum of side lengths |
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sum of interior angles = 180° |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.
If AD = 25 and BD = 15, AB = ?
| 9 | |
| 17 | |
| 11 | |
| 10 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDWhat is 9a + 3a?
| a2 | |
| 6 | |
| 12a | |
| 12a2 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
9a + 3a = 12a
Which of the following expressions contains exactly two terms?
polynomial |
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binomial |
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monomial |
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quadratic |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.
Solve for c:
-3c + 8 > \( \frac{c}{-1} \)
| c > 4 | |
| c > 3\(\frac{10}{13}\) | |
| c > \(\frac{2}{17}\) | |
| c > \(\frac{56}{71}\) |
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.
-3c + 8 > \( \frac{c}{-1} \)
-1 x (-3c + 8) > c
(-1 x -3c) + (-1 x 8) > c
3c - 8 > c
3c - 8 - c > 0
3c - c > 8
2c > 8
c > \( \frac{8}{2} \)
c > 4