| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.79 |
| Score | 0% | 76% |
If side x = 11cm, side y = 9cm, and side z = 15cm what is the perimeter of this triangle?
| 35cm | |
| 28cm | |
| 26cm | |
| 29cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 11cm + 9cm + 15cm = 35cm
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
h2 x l2 x w2 |
|
h x l x w |
|
lw x wh + lh |
|
2lw x 2wh + 2lh |
A cube is a rectangular solid box with a height (h), length (l), and width (w). The volume is h x l x w and the surface area is 2lw x 2wh + 2lh.
Which of the following statements about a triangle is not true?
sum of interior angles = 180° |
|
perimeter = sum of side lengths |
|
area = ½bh |
|
exterior angle = sum of two adjacent interior angles |
A triangle is a three-sided polygon. It has three interior angles that add up to 180° (a + b + c = 180°). An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite (d = b + c). The perimeter of a triangle is equal to the sum of the lengths of its three sides, the height of a triangle is equal to the length from the base to the opposite vertex (angle) and the area equals one-half triangle base x height: a = ½ base x height.
What is 3a + 2a?
| 5a | |
| 6a | |
| 6a2 | |
| 1 |
To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.
3a + 2a = 5a
If a = 2, b = 7, c = 9, and d = 2, what is the perimeter of this quadrilateral?
| 24 | |
| 20 | |
| 15 | |
| 21 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 2 + 7 + 9 + 2
p = 20