| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.90 |
| Score | 0% | 78% |
A right angle measures:
45° |
|
90° |
|
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.
If a = c = 8, b = d = 5, what is the area of this rectangle?
| 40 | |
| 20 | |
| 5 | |
| 18 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 8 x 5
a = 40
If a = c = 7, b = d = 8, and the blue angle = 51°, what is the area of this parallelogram?
| 36 | |
| 56 | |
| 72 | |
| 42 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 7 x 8
a = 56
What is the area of a circle with a diameter of 6?
| 7π | |
| 9π | |
| 3π | |
| 2π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{6}{2} \)
r = 3
a = πr2
a = π(32)
a = 9π
Simplify 3a x 4b.
| 7ab | |
| 12\( \frac{a}{b} \) | |
| 12ab | |
| 12a2b2 |
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 4b = (3 x 4) (a x b) = 12ab