| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.74 |
| Score | 0% | 75% |
If side x = 10cm, side y = 15cm, and side z = 14cm what is the perimeter of this triangle?
| 33cm | |
| 39cm | |
| 30cm | |
| 32cm |
The perimeter of a triangle is the sum of the lengths of its sides:
p = x + y + z
p = 10cm + 15cm + 14cm = 39cm
A quadrilateral is a shape with __________ sides.
4 |
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2 |
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3 |
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5 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
A(n) __________ is two expressions separated by an equal sign.
expression |
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problem |
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formula |
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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 formula for the area of a circle is which of the following?
a = π d2 |
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a = π r |
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a = π r2 |
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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 = \( \frac{y}{-5} \)
| -1\(\frac{17}{19}\) | |
| \(\frac{10}{13}\) | |
| \(\frac{5}{6}\) | |
| \(\frac{10}{11}\) |
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 = \( \frac{y}{-5} \)
-5 x (-9y + 8) = y
(-5 x -9y) + (-5 x 8) = y
45y - 40 = y
45y - 40 - y = 0
45y - y = 40
44y = 40
y = \( \frac{40}{44} \)
y = \(\frac{10}{11}\)