| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
If the base of this triangle is 2 and the height is 5, what is the area?
| 49\(\frac{1}{2}\) | |
| 5 | |
| 90 | |
| 35 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 2 x 5 = \( \frac{10}{2} \) = 5
What is 5a - 4a?
| 9 | |
| 1a | |
| 9a2 | |
| 20a2 |
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.
5a - 4a = 1a
A right angle measures:
90° |
|
180° |
|
360° |
|
45° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
Solve for a:
3a + 2 > 6 + 9a
| a > -3\(\frac{1}{2}\) | |
| a > -\(\frac{2}{3}\) | |
| a > \(\frac{1}{4}\) | |
| a > -2\(\frac{1}{4}\) |
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.
3a + 2 > 6 + 9a
3a > 6 + 9a - 2
3a - 9a > 6 - 2
-6a > 4
a > \( \frac{4}{-6} \)
a > -\(\frac{2}{3}\)
Order the following types of angle from least number of degrees to most number of degrees.
acute, obtuse, right |
|
right, obtuse, acute |
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acute, right, obtuse |
|
right, acute, obtuse |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.