TwistedSifter on MSN
Over 2,200 years ago, Eratosthenes calculated the circumference of Earth, and his math was almost totally accurate
Impressive, right?
The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. This ancient stellar ...
To draw constructions you need a pencil, ruler and a pair of compasses. Loci are used to identify areas that satisfy criteria such as a given distance from a point or halfway between two lines.
Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...
Sometimes we need to know how to calculate values for specific sections of a circle. These can include arc lengths, the area and perimeter of sectors and the area of segments. Loci and constructions – ...
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