| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
Order the following types of angle from least number of degrees to most number of degrees.
acute, obtuse, right |
|
right, acute, obtuse |
|
acute, right, obtuse |
|
right, obtuse, acute |
An acute angle measures less than 90°, a right angle measures 90°, and an obtuse angle measures more than 90°.
If c = -5 and z = 7, what is the value of 7c(c - z)?
| -144 | |
| 22 | |
| 420 | |
| -60 |
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.)
7c(c - z)
7(-5)(-5 - 7)
7(-5)(-12)
(-35)(-12)
420
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
vertical, supplementary |
|
acute, obtuse |
|
obtuse, acute |
|
supplementary, vertical |
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).
What is the circumference of a circle with a radius of 9?
| 18π | |
| 1π | |
| 30π | |
| 11π |
The formula for circumference is circle diameter x π. Circle diameter is 2 x radius:
c = πd
c = π(2 * r)
c = π(2 * 9)
c = 18π
Solve for b:
b - 4 = 2 - b
| -\(\frac{2}{3}\) | |
| -\(\frac{8}{9}\) | |
| 3 | |
| -\(\frac{5}{6}\) |
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.
b - 4 = 2 - b
b = 2 - b + 4
b + b = 2 + 4
2b = 6
b = \( \frac{6}{2} \)
b = 3