| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.18 |
| Score | 0% | 64% |
Which types of triangles will always have at least two sides of equal length?
equilateral, isosceles and right |
|
equilateral and isosceles |
|
equilateral and right |
|
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.
Solve for c:
4c + 3 = -8 - 3c
| \(\frac{3}{4}\) | |
| \(\frac{7}{8}\) | |
| \(\frac{1}{2}\) | |
| -1\(\frac{4}{7}\) |
To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.
4c + 3 = -8 - 3c
4c = -8 - 3c - 3
4c + 3c = -8 - 3
7c = -11
c = \( \frac{-11}{7} \)
c = -1\(\frac{4}{7}\)
If angle a = 69° and angle b = 40° what is the length of angle c?
| 65° | |
| 130° | |
| 54° | |
| 71° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 69° - 40° = 71°
If b = 2 and x = -6, what is the value of 2b(b - x)?
| 32 | |
| 20 | |
| 0 | |
| -20 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
2b(b - x)
2(2)(2 + 6)
2(2)(8)
(4)(8)
32
The formula for volume of a cube in terms of height (h), length (l), and width (w) is which of the following?
lw x wh + lh |
|
h2 x l2 x w2 |
|
2lw x 2wh + 2lh |
|
h x l x w |
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.