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What is an isosceles triangle? Simple geometry

By |2017-07-29T10:02:57+00:00July 29th, 2017|Math|

This is an isosceles triangle. Isosceles triangles have at least two sides that are exactly the same length. This forces two of their angles to also be acute angles of exactly the same size. In this blue triangle, the two longer sides are the same length, which forces the two bottom angles to be the same size. If the [...]

Equilateral triangle – Simple geometry

By |2017-07-29T09:56:35+00:00July 29th, 2017|Math|

This is an equilateral triangle. Equilateral triangles have all three sides exactly the same length. Because their sides are the same length, the three angles of an equilateral triangle are also all the same size, so they're each one third of 180 degrees, or 60 degrees. All three angles of any equilateral triangle are 60 degrees, no matter how [...]

What’s an angle? Geometry made simple

By |2017-07-29T10:01:22+00:00July 27th, 2017|Math|

Two lines cross and form four angles Where any two lines cross each other, they form four angles. These angles are parts of a circle (as you can see from the green circle segments), so, like a circle, they have to add up to 360 degrees. If the two lines are perpendicular to each other, then the four angles [...]

Who was Thales of Miletus? Greek Astronomy

By |2018-04-23T14:20:25+00:00July 18th, 2017|Greeks, Science|

Thales of Miletus might have watched plays in this theater at Miletus (before it had stone seats) Biography of Thales Thales was born in what's now Turkey, in the city of Miletus, about 630 BC, during the Archaic period. At that time, Miletus was a city where people spoke Greek, though it may have paid taxes or [...]

What is a pediment? Greek architecture

By |2017-07-29T09:59:18+00:00July 2nd, 2017|Architecture, Greeks|

The pediment is the triangular place under the roof of a Greek temple. Each temple has two pediments, one on the front and one on the back. They're always isosceles triangles. At first pediments were probably plain, but soon the Greeks began to decorate pediments with stone sculpture. One of the earliest pediments, on the [...]