| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
If side x = 9cm, side y = 9cm, and side z = 7cm what is the perimeter of this triangle?
| 29cm | |
| 37cm | |
| 33cm | |
| 25cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 9cm + 9cm + 7cm = 25cm
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.
A quadrilateral is a shape with __________ sides.
4 |
|
3 |
|
5 |
|
2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
If angle a = 68° and angle b = 45° what is the length of angle c?
| 116° | |
| 67° | |
| 110° | |
| 128° |
The sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 68° - 45° = 67°
Solve -2c + 4c = -4c - 3y + 6 for c in terms of y.
| -1\(\frac{2}{11}\)y - \(\frac{3}{11}\) | |
| \(\frac{5}{9}\)y + \(\frac{5}{9}\) | |
| -3\(\frac{1}{2}\)y + 3 | |
| -\(\frac{1}{3}\)y - \(\frac{4}{9}\) |
To solve this equation, isolate the variable for which you are solving (c) on one side of the equation and put everything else on the other side.
-2c + 4y = -4c - 3y + 6
-2c = -4c - 3y + 6 - 4y
-2c + 4c = -3y + 6 - 4y
2c = -7y + 6
c = \( \frac{-7y + 6}{2} \)
c = \( \frac{-7y}{2} \) + \( \frac{6}{2} \)
c = -3\(\frac{1}{2}\)y + 3