Euclidea 2.8 Solution Info

According to the Inscribed Angle Theorem, if you connect the four endpoints of these two perpendicular diameters, you form a quadrilateral. Because the central angles are all 90 degrees, the arcs subtended by those angles are all equal (one-quarter of the circle). Therefore, the chords connecting the endpoints are all equal in length, and the interior angles of the shape are all 90 degrees.

To do this efficiently using the Compass tool: euclidea 2.8 solution

The key to scoring high in Euclidea is not just drawing the correct shape, but doing so in the fewest "Elementary" moves. According to the Inscribed Angle Theorem, if you