| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
On this circle, line segment AB is the:
radius |
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circumference |
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chord |
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diameter |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
If a = 7, b = 8, c = 3, and d = 7, what is the perimeter of this quadrilateral?
| 26 | |
| 20 | |
| 23 | |
| 25 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 7 + 8 + 3 + 7
p = 25
If the base of this triangle is 8 and the height is 3, what is the area?
| 32\(\frac{1}{2}\) | |
| 12 | |
| 91 | |
| 60 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 8 x 3 = \( \frac{24}{2} \) = 12
The dimensions of this trapezoid are a = 5, b = 5, c = 8, d = 2, and h = 3. What is the area?
| 21 | |
| 25\(\frac{1}{2}\) | |
| 10\(\frac{1}{2}\) | |
| 15 |
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(5 + 2)(3)
a = ½(7)(3)
a = ½(21) = \( \frac{21}{2} \)
a = 10\(\frac{1}{2}\)
The formula for the area of a circle is which of the following?
a = π d |
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a = π r |
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a = π d2 |
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a = π r2 |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.