| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.74 |
| Score | 0% | 75% |
If angle a = 43° and angle b = 56° what is the length of angle c?
| 81° | |
| 78° | |
| 84° | |
| 68° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 43° - 56° = 81°
A right angle measures:
360° |
|
180° |
|
45° |
|
90° |
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 AD = 25 and BD = 19, AB = ?
| 15 | |
| 6 | |
| 3 | |
| 2 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDThe dimensions of this trapezoid are a = 6, b = 7, c = 7, d = 2, and h = 4. What is the area?
| 12 | |
| 28 | |
| 18 | |
| 11 |
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(7 + 2)(4)
a = ½(9)(4)
a = ½(36) = \( \frac{36}{2} \)
a = 18
Simplify 6a x 6b.
| 12ab | |
| 36\( \frac{b}{a} \) | |
| 36ab | |
| 36a2b2 |
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.
6a x 6b = (6 x 6) (a x b) = 36ab