| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.40 |
| Score | 0% | 68% |
What is the area of a circle with a radius of 4?
| 16π | |
| 3π | |
| 49π | |
| 9π |
The formula for area is πr2:
a = πr2
a = π(42)
a = 16π
If a = c = 1, b = d = 2, what is the area of this rectangle?
| 2 | |
| 4 | |
| 6 | |
| 35 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 1 x 2
a = 2
Simplify 5a x 2b.
| 7ab | |
| 10ab | |
| 10\( \frac{a}{b} \) | |
| 10a2b2 |
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.
5a x 2b = (5 x 2) (a x b) = 10ab
If angle a = 44° and angle b = 69° what is the length of angle c?
| 96° | |
| 67° | |
| 116° | |
| 111° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 44° - 69° = 67°
Which of the following statements about parallel lines with a transversal is not correct?
all of the angles formed by a transversal are called interior angles |
|
all acute angles equal each other |
|
same-side interior angles are complementary and equal each other |
|
angles in the same position on different parallel lines are called corresponding angles |
Parallel lines are lines that share the same slope (steepness) and therefore never intersect. A transversal occurs when a set of parallel lines are crossed by another line. All of the angles formed by a transversal are called interior angles and angles in the same position on different parallel lines equal each other (a° = w°, b° = x°, c° = z°, d° = y°) and are called corresponding angles. Alternate interior angles are equal (a° = z°, b° = y°, c° = w°, d° = x°) and all acute angles (a° = c° = w° = z°) and all obtuse angles (b° = d° = x° = y°) equal each other. Same-side interior angles are supplementary and add up to 180° (e.g. a° + d° = 180°, d° + c° = 180°).