| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.69 |
| Score | 0% | 74% |
If side x = 8cm, side y = 11cm, and side z = 5cm what is the perimeter of this triangle?
| 24cm | |
| 28cm | |
| 34cm | |
| 35cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 8cm + 11cm + 5cm = 24cm
For this diagram, the Pythagorean theorem states that b2 = ?
c2 - a2 |
|
c - a |
|
c2 + a2 |
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a2 - c2 |
The Pythagorean theorem defines the relationship between the side lengths of a right triangle. The length of the hypotenuse squared (c2) is equal to the sum of the two perpendicular sides squared (a2 + b2): c2 = a2 + b2 or, solved for c, \(c = \sqrt{a + b}\)
The formula for the area of a circle is which of the following?
a = π r2 |
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a = π d |
|
a = π d2 |
|
a = π r |
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(n) __________ is two expressions separated by an equal sign.
formula |
|
expression |
|
problem |
|
equation |
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.
The dimensions of this cube are height (h) = 5, length (l) = 2, and width (w) = 1. What is the volume?
| 5 | |
| 18 | |
| 180 | |
| 10 |
The volume of a cube is height x length x width:
v = h x l x w
v = 5 x 2 x 1
v = 10