| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
If side x = 6cm, side y = 8cm, and side z = 12cm what is the perimeter of this triangle?
| 28cm | |
| 23cm | |
| 31cm | |
| 26cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 6cm + 8cm + 12cm = 26cm
On this circle, a line segment connecting point A to point D is called:
circumference |
|
radius |
|
diameter |
|
chord |
A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).
If the base of this triangle is 2 and the height is 9, what is the area?
| 75 | |
| 27 | |
| 9 | |
| 45 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 2 x 9 = \( \frac{18}{2} \) = 9
If BD = 20 and AD = 26, AB = ?
| 8 | |
| 6 | |
| 13 | |
| 16 |
The entire length of this line is represented by AD which is AB + BD:
AD = AB + BD
Solving for AB:AB = AD - BDSolve for c:
5c + 4 = -2 + 2c
| 1\(\frac{1}{3}\) | |
| -2 | |
| -1\(\frac{1}{7}\) | |
| -\(\frac{8}{9}\) |
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.
5c + 4 = -2 + 2c
5c = -2 + 2c - 4
5c - 2c = -2 - 4
3c = -6
c = \( \frac{-6}{3} \)
c = -2