| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.18 |
| Score | 0% | 64% |
The dimensions of this cube are height (h) = 1, length (l) = 2, and width (w) = 5. What is the surface area?
| 258 | |
| 22 | |
| 34 | |
| 184 |
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 2 x 5) + (2 x 5 x 1) + (2 x 2 x 1)
sa = (20) + (10) + (4)
sa = 34
What is the area of a circle with a diameter of 10?
| 7π | |
| 9π | |
| 49π | |
| 25π |
The formula for area is πr2. Radius is circle \( \frac{diameter}{2} \):
r = \( \frac{d}{2} \)
r = \( \frac{10}{2} \)
r = 5
a = πr2
a = π(52)
a = 25π
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 side x = 12cm, side y = 10cm, and side z = 8cm what is the perimeter of this triangle?
| 26cm | |
| 28cm | |
| 24cm | |
| 30cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 12cm + 10cm + 8cm = 30cm
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
|
obtuse, acute |
|
acute, obtuse |
|
vertical, supplementary |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).