| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.59 |
| Score | 0% | 52% |
The formula for the area of a circle is which of the following?
c = π d2 |
|
c = π r |
|
c = π d |
|
c = 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.
If the base of this triangle is 9 and the height is 9, what is the area?
| 65 | |
| 60 | |
| 24 | |
| 40\(\frac{1}{2}\) |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 9 x 9 = \( \frac{81}{2} \) = 40\(\frac{1}{2}\)
Which types of triangles will always have at least two sides of equal length?
equilateral and right |
|
equilateral and isosceles |
|
isosceles and right |
|
equilateral, isosceles and right |
An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.
What is the circumference of a circle with a diameter of 18?
| 18π | |
| 5π | |
| 14π | |
| 36π |
The formula for circumference is circle diameter x π:
c = πd
c = 18π
The dimensions of this cube are height (h) = 7, length (l) = 6, and width (w) = 3. What is the surface area?
| 214 | |
| 162 | |
| 350 | |
| 166 |
The surface area of a cube is (2 x length x width) + (2 x width x height) + (2 x length x height):
sa = 2lw + 2wh + 2lh
sa = (2 x 6 x 3) + (2 x 3 x 7) + (2 x 6 x 7)
sa = (36) + (42) + (84)
sa = 162