| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
If the base of this triangle is 4 and the height is 4, what is the area?
| 84\(\frac{1}{2}\) | |
| 42 | |
| 8 | |
| 45\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 4 = \( \frac{16}{2} \) = 8
Which of the following statements about a triangle is not true?
sum of interior angles = 180° |
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area = ½bh |
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perimeter = sum of side lengths |
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exterior angle = sum of two adjacent interior angles |
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.
What is 8a - 7a?
| 1a | |
| 15a2 | |
| 1 | |
| a2 |
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.
8a - 7a = 1a
Solve for x:
x + 7 = \( \frac{x}{-5} \)
| \(\frac{64}{71}\) | |
| -6 | |
| -5\(\frac{5}{6}\) | |
| 1\(\frac{17}{19}\) |
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.
x + 7 = \( \frac{x}{-5} \)
-5 x (x + 7) = x
(-5 x x) + (-5 x 7) = x
-5x - 35 = x
-5x - 35 - x = 0
-5x - x = 35
-6x = 35
x = \( \frac{35}{-6} \)
x = -5\(\frac{5}{6}\)
Which of the following expressions contains exactly two terms?
quadratic |
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binomial |
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polynomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.