| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.25 |
| Score | 0% | 65% |
If angle a = 70° and angle b = 43° what is the length of angle c?
| 52° | |
| 100° | |
| 67° | |
| 40° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 70° - 43° = 67°
If the length of AB equals the length of BD, point B __________ this line segment.
midpoints |
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intersects |
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trisects |
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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 a = c = 5, b = d = 6, and the blue angle = 56°, what is the area of this parallelogram?
| 30 | |
| 18 | |
| 32 | |
| 15 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 5 x 6
a = 30
Factor y2 + 8y - 9
| (y + 1)(y - 9) | |
| (y - 1)(y - 9) | |
| (y - 1)(y + 9) | |
| (y + 1)(y + 9) |
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 -9 as well and sum (Inside, Outside) to equal 8. For this problem, those two numbers are -1 and 9. Then, plug these into a set of binomials using the square root of the First variable (y2):
y2 + 8y - 9
y2 + (-1 + 9)y + (-1 x 9)
(y - 1)(y + 9)
A right angle measures:
45° |
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90° |
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180° |
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360° |
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.