| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.61 |
| Score | 0% | 72% |
A right angle measures:
360° |
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45° |
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180° |
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90° |
A right angle measures 90 degrees and is the intersection of two perpendicular lines. In diagrams, a right angle is indicated by a small box completing a square with the perpendicular lines.
A cylinder with a radius (r) and a height (h) has a surface area of:
4π r2 |
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2(π r2) + 2π rh |
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π r2h |
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π r2h2 |
A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r2h and the surface area is 2(π r2) + 2π rh.
Which of the following statements about math operations is incorrect?
you can add monomials that have the same variable and the same exponent |
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you can subtract monomials that have the same variable and the same exponent |
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you can multiply monomials that have different variables and different exponents |
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all of these statements are correct |
You can only add or subtract monomials that have the same variable and the same exponent. For example, 2a + 4a = 6a and 4a2 - a2 = 3a2 but 2a + 4b and 7a - 3b cannot be combined. However, you can multiply and divide monomials with unlike terms. For example, 2a x 6b = 12ab.
If the base of this triangle is 4 and the height is 1, what is the area?
| 33 | |
| 2 | |
| 36 | |
| 56 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 4 x 1 = \( \frac{4}{2} \) = 2
If a = 2, b = 6, c = 3, and d = 2, what is the perimeter of this quadrilateral?
| 12 | |
| 17 | |
| 13 | |
| 31 |
Perimeter is equal to the sum of the four sides:
p = a + b + c + d
p = 2 + 6 + 3 + 2
p = 13