Geometry3

This document outlines different shapes in geometry including triangles, quadrilaterals, circles, and lines. It defines scalene, right, isosceles, obtuse, acute, and equilateral triangles. For quadrilaterals it lists rectangle, square, trapezoid, rhombus, and parallelogram. Circles are defined along with sector, diameter, chord, and central angle. Finally, it discusses parallel and perpendicular lines.