| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
If the length of AB equals the length of BD, point B __________ this line segment.
midpoints |
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trisects |
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intersects |
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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 = 9, b = 6, c = 4, and d = 6, what is the perimeter of this quadrilateral?
| 28 | |
| 25 | |
| 20 | |
| 9 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 9 + 6 + 4 + 6
p = 25
Which of the following is not true about both rectangles and squares?
the area is length x width |
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the lengths of all sides are equal |
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the perimeter is the sum of the lengths of all four sides |
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all interior angles are right angles |
A rectangle is a parallelogram containing four right angles. Opposite sides (a = c, b = d) are equal and the perimeter is the sum of the lengths of all sides (a + b + c + d) or, comonly, 2 x length x width. The area of a rectangle is length x width. A square is a rectangle with four equal length sides. The perimeter of a square is 4 x length of one side (4s) and the area is the length of one side squared (s2).
A(n) __________ is two expressions separated by an equal sign.
problem |
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expression |
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equation |
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formula |
An equation is two expressions separated by an equal sign. The key to solving equations is to repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
Simplify (7a)(3ab) - (3a2)(2b).
| 50a2b | |
| 50ab2 | |
| 15a2b | |
| 27a2b |
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.
(7a)(3ab) - (3a2)(2b)
(7 x 3)(a x a x b) - (3 x 2)(a2 x b)
(21)(a1+1 x b) - (6)(a2b)
21a2b - 6a2b
15a2b