| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.60 |
| Score | 0% | 72% |
The dimensions of this trapezoid are a = 5, b = 2, c = 7, d = 6, and h = 4. What is the area?
| 22\(\frac{1}{2}\) | |
| 18 | |
| 16 | |
| 24 |
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(2 + 6)(4)
a = ½(8)(4)
a = ½(32) = \( \frac{32}{2} \)
a = 16
A coordinate grid is composed of which of the following?
origin |
|
x-axis |
|
all of these |
|
y-axis |
The coordinate grid is composed of a horizontal x-axis and a vertical y-axis. The center of the grid, where the x-axis and y-axis meet, is called the origin.
A right angle measures:
90° |
|
360° |
|
180° |
|
45° |
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 the base of this triangle is 7 and the height is 9, what is the area?
| 63 | |
| 31\(\frac{1}{2}\) | |
| 58\(\frac{1}{2}\) | |
| 28 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 7 x 9 = \( \frac{63}{2} \) = 31\(\frac{1}{2}\)
What is the circumference of a circle with a radius of 7?
| 2π | |
| 9π | |
| 14π | |
| 11π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 7)
c = 14π