| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.78 |
| Score | 0% | 76% |
When two lines intersect, adjacent angles are __________ (they add up to 180°) and angles across from either other are __________ (they're equal).
supplementary, vertical |
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obtuse, acute |
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acute, obtuse |
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vertical, supplementary |
Angles around a line add up to 180°. Angles around a point add up to 360°. When two lines intersect, adjacent angles are supplementary (they add up to 180°) and angles across from either other are vertical (they're equal).
If c = -5 and x = -9, what is the value of -7c(c - x)?
| 140 | |
| 240 | |
| -30 | |
| -448 |
To solve this equation, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
-7c(c - x)
-7(-5)(-5 + 9)
-7(-5)(4)
(35)(4)
140
What is the circumference of a circle with a diameter of 4?
| 12π | |
| 3π | |
| 2π | |
| 4π |
The formula for circumference is circle diameter x π:
c = πd
c = 4π
Which of the following is not a part of PEMDAS, the acronym for math order of operations?
pairs |
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addition |
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exponents |
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division |
When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
A right angle measures:
90° |
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45° |
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360° |
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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.