| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
If angle a = 67° and angle b = 68° what is the length of angle c?
| 101° | |
| 45° | |
| 102° | |
| 103° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 67° - 68° = 45°
The formula for the area of a circle is which of the following?
a = π d2 |
|
a = π r2 |
|
a = π r |
|
a = π d |
The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)2 : a = π r2.
Solve for y:
9y - 8 = -5 + 2y
| -5 | |
| -1 | |
| \(\frac{3}{7}\) | |
| -\(\frac{3}{4}\) |
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.
9y - 8 = -5 + 2y
9y = -5 + 2y + 8
9y - 2y = -5 + 8
7y = 3
y = \( \frac{3}{7} \)
y = \(\frac{3}{7}\)
A(n) __________ is two expressions separated by an equal sign.
equation |
|
problem |
|
formula |
|
expression |
An equation is two expressions separated by an equal sign. The key to solving equations is to 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.
A trapezoid is a quadrilateral with one set of __________ sides.
parallel |
|
right angle |
|
equal angle |
|
equal length |
A trapezoid is a quadrilateral with one set of parallel sides.