Geometry on the AMC 10

Angle chasing, polygon angle sums, regular polygons, parallel lines

Chords, tangents, inscribed angles, power of a point, arc length, sectors, inscribed/circumscribed circles

Distance, slope, lines, circles in the plane, reflections over lines, lattice points

Maximum/minimum length or area, shortest paths, extremal configurations

Areas of quadrilaterals/polygons, trapezoids, shoelace, decomposition, hexagons

Similarity ratios, congruence, proportional segments, area ratios of similar figures

Volume, surface area, cubes, cones, spheres, cylinders, cross-sections, nets

Rotations, reflections, folding, tessellations, symmetric figures

Medians, angle bisectors, altitudes, incenter/circumcenter/centroid, Heron, Stewart, angle bisector theorem

Triangle area, Pythagorean theorem, special right triangles, triangle inequality

Law of sines/cosines, trig values, trig identities (rare on AMC 10)