| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
If angle a = 40° and angle b = 61° what is the length of angle c?
| 79° | |
| 73° | |
| 83° | |
| 112° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 40° - 61° = 79°
What is the circumference of a circle with a radius of 9?
| 8π | |
| 18π | |
| 7π | |
| 2π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 9)
c = 18π
If the length of AB equals the length of BD, point B __________ this line segment.
midpoints |
|
trisects |
|
intersects |
|
bisects |
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.
The dimensions of this trapezoid are a = 6, b = 8, c = 7, d = 7, and h = 5. What is the area?
| 10 | |
| 32 | |
| 37\(\frac{1}{2}\) | |
| 20 |
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(8 + 7)(5)
a = ½(15)(5)
a = ½(75) = \( \frac{75}{2} \)
a = 37\(\frac{1}{2}\)
What is 9a + 8a?
| 17a2 | |
| a2 | |
| 1 | |
| 17a |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
9a + 8a = 17a