| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
If angle a = 67° and angle b = 32° what is the length of angle c?
| 104° | |
| 81° | |
| 70° | |
| 83° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 67° - 32° = 81°
If side a = 9, side b = 8, what is the length of the hypotenuse of this right triangle?
| \( \sqrt{113} \) | |
| \( \sqrt{68} \) | |
| \( \sqrt{13} \) | |
| \( \sqrt{145} \) |
According to the Pythagorean theorem, the hypotenuse squared is equal to the sum of the two perpendicular sides squared:
c2 = a2 + b2
c2 = 92 + 82
c2 = 81 + 64
c2 = 145
c = \( \sqrt{145} \)
If a = c = 7, b = d = 5, what is the area of this rectangle?
| 45 | |
| 10 | |
| 35 | |
| 36 |
The area of a rectangle is equal to its length x width:
a = l x w
a = a x b
a = 7 x 5
a = 35
The dimensions of this cylinder are height (h) = 3 and radius (r) = 4. What is the surface area?
| 14π | |
| 180π | |
| 160π | |
| 56π |
The surface area of a cylinder is 2πr2 + 2πrh:
sa = 2πr2 + 2πrh
sa = 2π(42) + 2π(4 x 3)
sa = 2π(16) + 2π(12)
sa = (2 x 16)π + (2 x 12)π
sa = 32π + 24π
sa = 56π
A coordinate grid is composed of which of the following?
all of these |
|
y-axis |
|
origin |
|
x-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.