A circle is inscribed within an isosceles trapezoid. All four sides of the trapezoid are tangent to the circle. Angle θ has a measure of 72.7325641 degrees; the trapezoid has an area of 2,368 square ...

Newly translated ancient tablets show that ancient Babylonian astronomers used unexpectedly advanced geometry to understand the planets. The find, described on Thursday in the journal Science, reveals ...