| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.90 |
| Score | 0% | 58% |
If the area of this square is 36, what is the length of one of the diagonals?
| 5\( \sqrt{2} \) | |
| 3\( \sqrt{2} \) | |
| 6\( \sqrt{2} \) | |
| 2\( \sqrt{2} \) |
To find the diagonal we need to know the length of one of the square's sides. We know the area and the area of a square is the length of one side squared:
a = s2
so the length of one side of the square is:
s = \( \sqrt{a} \) = \( \sqrt{36} \) = 6
The Pythagorean theorem defines the square of the hypotenuse (diagonal) of a triangle with a right angle as the sum of the squares of the other two sides:
c2 = a2 + b2
c2 = 62 + 62
c2 = 72
c = \( \sqrt{72} \) = \( \sqrt{36 x 2} \) = \( \sqrt{36} \) \( \sqrt{2} \)
c = 6\( \sqrt{2} \)
The dimensions of this trapezoid are a = 4, b = 4, c = 5, d = 4, and h = 2. What is the area?
| 20 | |
| 8 | |
| 14 | |
| 35 |
The area of a trapezoid is one-half the sum of the lengths of the parallel sides multiplied by the height:
a = ½(b + d)(h)
a = ½(4 + 4)(2)
a = ½(8)(2)
a = ½(16) = \( \frac{16}{2} \)
a = 8
If the length of AB equals the length of BD, point B __________ this line segment.
intersects |
|
bisects |
|
midpoints |
|
trisects |
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.
What is the area of a circle with a diameter of 10?
| 25π | |
| 81π | |
| 6π | |
| 5π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{10}{2} \)
r = 5
a = πr2
a = π(52)
a = 25π
Solve for z:
6z + 2 > -7 - 2z
| z > -1 | |
| z > -1\(\frac{1}{8}\) | |
| z > 1\(\frac{1}{3}\) | |
| z > \(\frac{2}{3}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the > sign and the answer on the other.
6z + 2 > -7 - 2z
6z > -7 - 2z - 2
6z + 2z > -7 - 2
8z > -9
z > \( \frac{-9}{8} \)
z > -1\(\frac{1}{8}\)