Euclid’s Elements, which presented the state of the art in geometry around 300 B.C., has been extraordinarily influential. This massive, 13-volume compendium set the standard for mathematical ...

Interior angles in a triangle add up to 180˚. Triangles close triangleA polygon with three straight sides. have three sides, therefore they have three angles. Interior angles in a triangle sum to a ...

Before Abraham Lincoln was president, he spent many years as a prairie lawyer out in the frontier state of Illinois, where he decided to study a very old math book to help him think through his legal ...

CBSE class 10 Math exam approaching. Deleted topics: Euclid's division lemma, decimal representation of rational numbers, division algorithm for polynomials, equations reducible to linear equations, ...

A scalene triangle has 3 sides of different lengths and 3 unequal angles. An isosceles triangle has 2 sides of equal length. The dashes on the lines show they are equal in length. The angles at the ...