| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.79 |
| Score | 0% | 56% |
If AD = 11 and BD = 3, AB = ?
| 6 | |
| 18 | |
| 5 | |
| 8 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDThe formula for the area of a circle is which of the following?
a = π d |
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a = π d2 |
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a = π r |
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a = π r2 |
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.
The formula for the area of a circle is which of the following?
c = π d |
|
c = π r |
|
c = π r2 |
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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.
Solve for a:
4a + 5 < \( \frac{a}{-3} \)
| a < -10 | |
| a < -1\(\frac{2}{13}\) | |
| a < \(\frac{2}{3}\) | |
| a < 1\(\frac{11}{37}\) |
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.
4a + 5 < \( \frac{a}{-3} \)
-3 x (4a + 5) < a
(-3 x 4a) + (-3 x 5) < a
-12a - 15 < a
-12a - 15 - a < 0
-12a - a < 15
-13a < 15
a < \( \frac{15}{-13} \)
a < -1\(\frac{2}{13}\)
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
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vertical, supplementary |
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obtuse, acute |
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acute, obtuse |
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).