Question

anybody know how to find area of a trapezoid without knowing the height ?

Answer 1

What are your given properties?

Answer 2

Area is ((a+b)/2)h

Answer 3

Or ((b1+b2)/2)h

Answer 4

Both require a height, so I'm not sure how to find it without one :-/ Let me see if I can find something online :)

Answer 5

ok thank you :) if I'm not mistaken my teacher told me I would have to use sin so I am assuming it would be something like sin60 = h/8 ? but if that is the case I'm not sure where to go from there if that is the case

Answer 6

Hmm..what about trying to use the pythagorean theorem to find the area of the triangle and then solving for the area of the rectangle?

Answer 7

Ugh ... I give up lol, but thank you for your time <3

Answer 8

Sorry I couldn't help! :(

Answer 9

Its okay :)

Answer 10

You can determine the height from the traps 4 sides using this,
$$
h= \frac{\sqrt{(-a+b+c+d)(a-b+c+d)(a-b+c-d)(a-b-c+d)}}{2|b-a|}
$$

The use the area of a trap
$$
K = \frac{a + b}{2} \cdot h
$$


Does this help?

Answer 11

I just saw your pic.

$$
h=8\sin 60
$$


Then use the formula for area above