EMERGENCY! High School Math Problem Perimeter Area Volume as subject

Question

Regulations require Marc to have shade cloth in the backyard. He plans to place a triangular piece of cloth in the back corner as shown in the diagram. How many metres of square cloth does he need? The diagram shows the shade cloth as being 6m x 7m x ? . I don't know how to work this out, it's my last question brain is fried and would love some help eithr through an answer or telling me how to work it out. Thankks!! P.S this is due in 11 hours and I am buggered for how to do it

Answer 1

I agree with Griffins, only the topic is on Perimeter Area Volume but the the above answer is more on pythagoras' theorem.

Maybe you have to use the area of a triangle rule: 1/2 x base x height? so you would get 1/2 x 6 x 7 = 21

I'm not really sure

Answer 2

it depends on the diagram.  If the two measurements you have are the shorter pieces of the triangle, you would use:

(6x6)+(7X7)=(HxH)

36+49=85

sqrt(85)=9.22

so the third side would be 9.22 m.