# trapezoid area   46 videos

• #### Area of Trapezoids

##### GeometryArea

How to derive the area of a trapezoid formula using the area of a rectangle.

trapezoid parallelogram base height
• #### Trapezoid Properties

##### GeometryPolygons

How to identify a trapezoid and its special properties.

parallel sides isosceles trapezoid base angles base
• #### Trapezoid Midsegment Properties

##### GeometryPolygons

How to define the midsegment of a trapezoid, calculate its length, and relate it to a triangle midsegment.

midsegment trapezoid average bases midpoint
• #### Area of Triangles

##### GeometryArea

How to derive the area of a triangle formula using the rectangle area formula.

area triangles rectangles altitude
• #### Area of Parallelograms

##### GeometryArea

How to find the area of any parallelogram using rectangle area formulas.

area of rectangles base times height
• #### Area of a Segment

##### GeometryArea

How to derive the area of a segment formula.

• #### Trapezoid Arch and Panel Design Problem

##### GeometryPolygons

How to strategize about solving a problem with trapezoidal arches.

• #### Area of Circles

##### GeometryArea

How to derive the formula to calculate the area of a circle.

• #### Area With Determinants

##### PrecalculusSystems of Linear Equations and Matrices

How to compute the area of a parallelogram using a determinant.

parallelogram vectors determinant area
• #### Surface Area of Cylinders

##### GeometryArea

How to prove the surface area of a cylinder formula.

circle lateral area circumference
• #### Surface Area of Spheres

##### GeometryVolume

How to calculate the surface area of a sphere given a radius.

• #### Definite Integrals and Area

##### CalculusThe Definite Integral

How to use definite integrals to find the area between a curve or under a curve.

definite integral area problems area between curves
• #### Surface Area of Cones

##### GeometryArea

How to calculate the surface area of any cone explaining lateral surface area.

cone circle circumference lateral area lateral edge
• #### Surface Area of Prisms

##### GeometryArea

How to calculate the surface area of any prism.

prism 3d bases lateral faces lateral area surface area
• #### Area of a Sector

##### GeometryArea

How to derive the formula to calculate the area of a sector in a circle.

sector central angle intercepted arc circle radius area
• #### Similarity and Area Ratios

##### GeometrySimilarity

How to convert between length and area ratios of similar polygons

polygons similar area ratios
• #### Multiplying Polynomials using Area Models

##### AlgebraPolynomials

How to relate area of rectangles to multiplying polynomials.

area binomial trinomial distributing
• #### Surface Area of Joined Solids

##### GeometryArea

How to calculate the surface area of a cylinder joined to a cone.

joined solid cone cylinder lateral area circle
• #### Surface Area of Pyramids

##### GeometryArea

How to calculate the surface area of any pyramid, emphasizing regular polygons as bases.

regular polygon lateral area apothem
• #### Using Sine to Calculate the Area of a Triangle

##### GeometryBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine