| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.87 |
| Score | 0% | 57% |
The dimensions of this cylinder are height (h) = 8 and radius (r) = 8. What is the surface area?
| 12π | |
| 256π | |
| 4π | |
| 72π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(82) + 2π(8 x 8)
sa = 2π(64) + 2π(64)
sa = (2 x 64)π + (2 x 64)π
sa = 128π + 128π
sa = 256π
What is the area of a circle with a radius of 3?
| 4π | |
| 3π | |
| 16π | |
| 9π |
The formula for area is πr2:
a = πr2
a = π(32)
a = 9π
The dimensions of this cube are height (h) = 7, length (l) = 5, and width (w) = 6. What is the surface area?
| 232 | |
| 292 | |
| 214 | |
| 254 |
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 5 x 6) + (2 x 6 x 7) + (2 x 5 x 7)
sa = (60) + (84) + (70)
sa = 214
Which types of triangles will always have at least two sides of equal length?
equilateral and right |
|
isosceles and right |
|
equilateral, isosceles and right |
|
equilateral and isosceles |
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.
If a = c = 1, b = d = 7, and the blue angle = 56°, what is the area of this parallelogram?
| 7 | |
| 4 | |
| 5 | |
| 28 |
The area of a parallelogram is equal to its length x width:
a = l x w
a = a x b
a = 1 x 7
a = 7