1.  Median of an isosceles trapezoid (also known as midline or midsegment) if you know bases  

middle line isosceles trapezoid ab

 

a , b     -  bases

m12 red  - midline

 

 

Find the midline of a trapezoid if given bases ( m red ) :

middle line isosceles trapezoid ab F

 

 

2.  Median of an isosceles trapezoid (also known as midline or midsegment), if you know base, height and angles at the base  

middle line isosceles trapezoid h

a black  - lower base

b black  - upper base

c black    -  leg (lateral side)

alpha orange   -  angle at the base

h  - height

m12 red  - midline

 

Find the median of a trapezoid if given base, height and angles at the base ( m red ) :

middle line isosceles trapezoid h F1

middle line isosceles trapezoid h F2

middle line isosceles trapezoid h F3

middle line isosceles trapezoid h F4

 

 

3.  Median of an isosceles trapezoid (also known as midline or midsegment), if you know diagonal, height and angle between the diagonals   

middle line isosceles trapezoid d

 

d blue1  -  diagonal

alpha orange , beta brown     -  angles between the diagonals

h  - height

m12 red  - midline

 

Find the median of a trapezoid if given diagonal, height and angle between the diagonals ( m red ) :

middle line isosceles trapezoid d F

 

 

4.  Median of an isosceles trapezoid (also known as midline or midsegment), if you know area of a trapezoid and height or lateral side and angle at the base  

middle line isosceles trapezoid S

A18 black  - areaof a trapezoid

c black    -  leg (lateral side)

h  - height

alpha orange   -  angle at the base

m12 red  - midline

 

Find the median of a trapezoid if given area of a trapezoid and height or lateral side and angle at the base ( m red ) :

middle line isosceles trapezoid S F1   middle line isosceles trapezoid S F2