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# Monthly Archives: July 2017

## Arc of a Circle

is a diameter of a circle of radius unit. is a chord perpendicular to that cuts at . If the arc is of the circumference of the circle, what is the length of the segment ? Source: NCTM Mathematics Teacher, … Continue reading

## Multiplicative Inverse

If , then in the form of , what does equal? Source: NCTM Mathematics Teacher, September 2006 Solution By definition of multiplication inverse Answer:

Posted in Problem solving
Tagged complex numbers, grade 8, multiplicative inverse, NCTM Mathematics Teacher
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## Second Number Larger Than The First

Suppose a six-sided die has sides numbered through . If a person throws the die two times, what is the probability that the second number will be larger than the first? Source: NCTM Mathematics Teacher, September 2006 Solution The desirable … Continue reading

Posted in Problem solving
Tagged combinatorics, counting, grade 8, independent events, NCTM Mathematics Teacher, power, probability, six-sided die
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