| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.64 |
| Score | 0% | 73% |
A right angle measures:
90° |
|
45° |
|
180° |
|
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.
Order the following types of angle from least number of degrees to most number of degrees.
acute, right, obtuse |
|
right, obtuse, acute |
|
right, acute, obtuse |
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acute, obtuse, right |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
Simplify 3a x 6b.
| 18a2b2 | |
| 18\( \frac{a}{b} \) | |
| 9ab | |
| 18ab |
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.
3a x 6b = (3 x 6) (a x b) = 18ab
The dimensions of this cube are height (h) = 4, length (l) = 4, and width (w) = 3. What is the surface area?
| 124 | |
| 142 | |
| 80 | |
| 82 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 4 x 3) + (2 x 3 x 4) + (2 x 4 x 4)
sa = (24) + (24) + (32)
sa = 80
If side a = 5, side b = 1, what is the length of the hypotenuse of this right triangle?
| \( \sqrt{26} \) | |
| \( \sqrt{85} \) | |
| 10 | |
| \( \sqrt{10} \) |
According to the Pythagorean theorem, the hypotenuse squared is equal to the sum of the two perpendicular sides squared:
c2 = a2 + b2
c2 = 52 + 12
c2 = 25 + 1
c2 = 26
c = \( \sqrt{26} \)