| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.14 |
| Score | 0% | 63% |
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
|
acute, obtuse |
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supplementary, vertical |
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obtuse, acute |
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).
Factor y2 - 2y - 3
| (y + 3)(y + 1) | |
| (y - 3)(y + 1) | |
| (y + 3)(y - 1) | |
| (y - 3)(y - 1) |
To factor a quadratic expression, apply the FOIL method (First, Outside, Inside, Last) in reverse. First, find the two Last terms that will multiply to produce -3 as well and sum (Inside, Outside) to equal -2. For this problem, those two numbers are -3 and 1. Then, plug these into a set of binomials using the square root of the First variable (y2):
y2 - 2y - 3
y2 + (-3 + 1)y + (-3 x 1)
(y - 3)(y + 1)
If the length of AB equals the length of BD, point B __________ this line segment.
trisects |
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midpoints |
|
intersects |
|
bisects |
A line segment is a portion of a line with a measurable length. The midpoint of a line segment is the point exactly halfway between the endpoints. The midpoint bisects (cuts in half) the line segment.
If angle a = 38° and angle b = 65° what is the length of angle c?
| 92° | |
| 83° | |
| 90° | |
| 77° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 38° - 65° = 77°
The dimensions of this cube are height (h) = 9, length (l) = 9, and width (w) = 8. What is the volume?
| 648 | |
| 168 | |
| 60 | |
| 20 |
The volume of a cube is height x length x width:
v = h x l x w
v = 9 x 9 x 8
v = 648