| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
If angle a = 64° and angle b = 55° what is the length of angle c?
| 91° | |
| 61° | |
| 124° | |
| 65° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 64° - 55° = 61°
Simplify (9a)(8ab) + (3a2)(2b).
| 85a2b | |
| 78ab2 | |
| 78a2b | |
| -66ab2 |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
(9a)(8ab) + (3a2)(2b)
(9 x 8)(a x a x b) + (3 x 2)(a2 x b)
(72)(a1+1 x b) + (6)(a2b)
72a2b + 6a2b
78a2b
On this circle, a line segment connecting point A to point D is called:
radius |
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circumference |
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diameter |
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chord |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
Simplify 2a x 3b.
| 6\( \frac{b}{a} \) | |
| 6a2b2 | |
| 6\( \frac{a}{b} \) | |
| 6ab |
To multiply monomials, multiply the coefficients (the numbers that come before the variables) of each term, add the exponents of like variables, and multiply the different variables together.
2a x 3b = (2 x 3) (a x b) = 6ab
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
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acute, obtuse |
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obtuse, acute |
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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).