| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.09 |
| Score | 0% | 62% |
Order the following types of angle from least number of degrees to most number of degrees.
acute, right, obtuse |
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right, acute, obtuse |
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acute, obtuse, right |
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right, obtuse, acute |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
On this circle, a line segment connecting point A to point D is called:
radius |
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chord |
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circumference |
|
diameter |
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).
Solve for a:
a2 + 4a - 32 = 0
| 6 or -4 | |
| 4 or -8 | |
| 3 or -1 | |
| 5 or -6 |
The first step to solve a quadratic equation that's set to zero is to factor the quadratic equation:
a2 + 4a - 32 = 0
(a - 4)(a + 8) = 0
For this expression to be true, the left side of the expression must equal zero. Therefore, either (a - 4) or (a + 8) must equal zero:
If (a - 4) = 0, a must equal 4
If (a + 8) = 0, a must equal -8
So the solution is that a = 4 or -8
Simplify (2a)(3ab) - (7a2)(7b).
| 43ab2 | |
| 55a2b | |
| 70ab2 | |
| -43a2b |
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)(3ab) - (7a2)(7b)
(2 x 3)(a x a x b) - (7 x 7)(a2 x b)
(6)(a1+1 x b) - (49)(a2b)
6a2b - 49a2b
-43a2b
If a = c = 6, b = d = 1, and the blue angle = 51°, what is the area of this parallelogram?
| 20 | |
| 63 | |
| 8 | |
| 6 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 6 x 1
a = 6