Use the calculator on the right to calculate height, base lengths and area of a trapezoid. Enter any three values and the missing one will be calculated.http://www.mathopenref.com/trapezoidarea.html This page describes how to derive the forumula for the area of a trapezoid, by creating a parallelogram from two congruent trapezoids. The equation is then found by ...http://www.mathopenref.com/trapezoidareaderive.html The formula for area of a trapezoid explained! ... This feature is not available right now. Please try again later.http://www.youtube.com/watch?v=yTnYRpcZA9c Formula for area of a square, rectangle, circle, parallelogram and triangle. Examples and lessons are included.http://www.mathexpression.com/formula-for-area.html Summary: To find the area of a trapezoid, take the sum of its bases, multiply the sum by the height of the trapezoid, and then divide the result by 2, The formula for ...http://www.mathgoodies.com/lessons/vol1/area_trapezoid.html If you don't know the height of a trapezoid, solve for it by imagining height as one side of a right triangle and using the Pythagorean Theorem.http://www.ehow.com/how_2216259_find-area-trapezoid.html Math video teaches students how to find the area of a trapezoid.http://www.mathplayground.com/howto_area_trapezoid.html There is no relationship between the perimeter and the area of a rhombus. Take a rhombus with all 4 sides = 2 units. Therefore the perimeter is 8 units.http://www.answers.com/Q/What_is_the_formula_for_the_area_of_a_rhombus Question 188660This question is from textbook saxon algebra 2: The formula for the area of a trapezoid is A=1/2(b1+b2)h. Solve the formula for b1.http://www.algebra.com/algebra/homework/equations/Equations.faq.question.188660.html Area and Volume Formula for geometrical figures - square, rectangle, triangle, polygon, circle, ellipse, trapezoid, cube, sphere, cylinder and cone.http://www.science.co.il/formula.asp A trapezoid is a cousin of the parallelogram. However, in trapezoid only two of the opposing sides are parallel to each other. Here's we explain how to find its area.https://www.khanacademy.org/math/geometry/basic-geometry/area_non_standard/v/area-of-a-trapezoid-1#!