| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
A trapezoid is a quadrilateral with one set of __________ sides.
right angle |
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equal angle |
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equal length |
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parallel |
A trapezoid is a quadrilateral with one set of parallel sides.
If side x = 11cm, side y = 8cm, and side z = 12cm what is the perimeter of this triangle?
| 31cm | |
| 33cm | |
| 18cm | |
| 22cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 11cm + 8cm + 12cm = 31cm
What is 5a6 + 9a6?
| a612 | |
| 14a12 | |
| 14a6 | |
| 45a12 |
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.
5a6 + 9a6 = 14a6
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
acute, obtuse |
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obtuse, acute |
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vertical, supplementary |
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supplementary, vertical |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
Solve for y:
-9y - 3 < \( \frac{y}{2} \)
| y < -\(\frac{6}{23}\) | |
| y < -1\(\frac{4}{41}\) | |
| y < -\(\frac{6}{19}\) | |
| y < 1\(\frac{11}{25}\) |
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.
-9y - 3 < \( \frac{y}{2} \)
2 x (-9y - 3) < y
(2 x -9y) + (2 x -3) < y
-18y - 6 < y
-18y - 6 - y < 0
-18y - y < 6
-19y < 6
y < \( \frac{6}{-19} \)
y < -\(\frac{6}{19}\)