Evaluate the integral of 1/(e^x+e^-x)

Construct a regular hexagon

Draw a regular pentagon without using a scale

Draw a circle without a compass

Draw an oval or an ellipse

Draw an equilateral triangle, without using compass and protractor

constructing an equilateral triangle

Construct an equilateral triangle.

Proof of a square- b square = (a+b)(a-b)

Draw a rhombus without a scale

Construct a regular hexagon

Proof of (a+b)square =a square +2ab + b square

Draw a regular hexagon without a compass or protractor