A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure?

The altitude of the trapezoid is?
PLEASEE HELP ME UNDERSTAND THIS!!!!!

Question

A lot is in the shape of a trapezoid. The sum of the bases is 180 feet. If the area of the lot is 8,100 square feet, what is the distance across the lot, i.e. the altitude of the figure?

The altitude of the trapezoid is? 
PLEASEE HELP ME UNDERSTAND THIS!!!!!

shamim · Answer

area of a trapezoid=(1/2)*(sum of two parallel lines)*altitude

shamim · Answer

so   8100=(1/2)*180*altitude

shamim · Answer

altitude=?

anonymous · Answer

Let z be the vertical height of the trapezoid,

180 x z = 8100

To solve for z, we remove 180 from the left side
To do that we divide both sides by 180
Which leaves us z = 45

P.S I think that's what you mean by altitude