Sophia Learning
Sophia: Trapezoid Height and Base: Lesson 3
This lesson will demonstrate how to solve for an unknown height or base of a trapezoid when given the area. It is 3 of 5 in the series titled "Trapezoid Height and Base."
Sophia Learning
Sophia: Using Triangles to Examine Quadrilaterals
This lesson demonstrates how to determine properties of quadrilaterals by using triangles.
Sophia Learning
Sophia: Coordinate Geometry of Rectangles: Lesson 1
This lesson [8:39] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a rectangle in a coordinate plane. It is 1 of 5 in the series titled...