Students learn the definitions of a rectangle, a rhombus, and a square. Students also learn the following theorems. The diagonals of a rectangle are congruent. The diagonals of a rhombus are perpendicular and bisect the angles of the rhombus. The midpoint of the hypotenuse of a right triangle is equidistant from the three vertices. Students are then asked to solve problems related to these concepts using Algebra.