C fires at city B and D fires at city A, but their rockets collide in mid-air and fall into the ground at F. Then C fires a laser bouncing off the ground at F at the same angle as incidence. Will the laser beam hit combatant D?
Two intersecting circles inside a rectangle and a line segment connecting vertex, intersection point and tangency point. What’s the angle α?
An equilateral triangle and three line segments. What’s the angle α?
Two squares and two line segments. If the angle α is maximal, what is yellow : red?
A regular hexagon and two squares. What’s the angle α?
Two squares sharing a vertex, a diagonal and a line segment. Prove that the two angles are congruent.
Three congruent squares share three vertices. What’s the angle α?
A square containing a semicircle, a circle and two tangents. What’s the angle α?
A triangle and two semicircles. What’s the angle α?
An equilateral triangle and a rectangle. What’s the angle α?