Question 386624
This question is very simple if you know what formula to use.
Because you are making a banner and need a certain amount of fabric, you are trying to find the area of the triangle that will act as the banner. The formula to find the area of a triangle is below:
let A=the area of the triangle
let h=the hight of the triangle
let b=the base of the triangle
A={{{(1/2)*h*b}}}

This formula works because a triangle is always half of a rectangle, and the formula for a rectangle is:
{{{A=h*b}}}

Now, we can easily plug in the length of the height and base to find the triangle's area.

A={{{(1/2)*h*b}}}
A={{{(1/2)*6*6}}}
A={{{(1/2)*36}}}
A={{{18ft^2}}}

The area is {{{18ft^2}}}, but we need to know the area in square yards.
There are 3 feet per yard, so there are 9 square feet per square yard.
Therefore, if you divide our answer in square feet by 9, you will get our answer in square yards. 18 divided by 9 is 2.
There are 2 square yards of fabric needed.