| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.78 |
| Score | 0% | 76% |
If angle a = 52° and angle b = 53° what is the length of angle d?
| 119° | |
| 112° | |
| 149° | |
| 128° |
An exterior angle of a triangle is equal to the sum of the two interior angles that are opposite:
d° = b° + c°
To find angle c, remember that the sum of the interior angles of a triangle is 180°:
180° = a° + b° + c°
c° = 180° - a° - b°
c° = 180° - 52° - 53° = 75°
So, d° = 53° + 75° = 128°
A shortcut to get this answer is to remember that angles around a line add up to 180°:
a° + d° = 180°
d° = 180° - a°
d° = 180° - 52° = 128°
A right angle measures:
360° |
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90° |
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45° |
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180° |
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.
If the base of this triangle is 9 and the height is 7, what is the area?
| 17\(\frac{1}{2}\) | |
| 56 | |
| 31\(\frac{1}{2}\) | |
| 33 |
The area of a triangle is equal to ½ base x height:
a = ½bh
a = ½ x 9 x 7 = \( \frac{63}{2} \) = 31\(\frac{1}{2}\)
A quadrilateral is a shape with __________ sides.
5 |
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3 |
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4 |
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2 |
A quadrilateral is a shape with four sides. The perimeter of a quadrilateral is the sum of the lengths of its four sides.
Which of the following expressions contains exactly two terms?
binomial |
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quadratic |
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polynomial |
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monomial |
A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.