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it is A=1/2h(b1+b2)for b1
A=0.5*h*(b1+b2) 2A/h=b1+b2 b1=2A/h-b2
Well, from your partially written out question, I assumed you want to solve the trapezoid formula for b1.
no that is the question that my techer gave me
So what is your question?
14. Solve the area formula for a trapezoid, , for . (2 points) b1 = 2Ah – b2 1.b1= 2Ahb2 2.b1=2A/hb1 3.b1=1/2ahb1 4.b1= 2Ahb2 wech wo is rifgt
i mean right
None of them are right...
yes i got it it is b1=AH-b2
i mean it hase to be
Why? Try going from that back to the area formula for a trapezoid.
i got b2=1/2hb1a
Write out your steps? I swear you need a subtraction in there somewhere.
i do not get any of it
can you help
hey taking a look
so what was given was the first line? b1 = 2Ah – b2
14. Solve the area formula for a trapezoid
ah ok so this is the formula of the trapazoid? t is A=1/2h(b1+b2)for b1
2A = 1/2h(b1+b2)
err sorry 2A/h = b1+ b2
b1 = 2A/h - b2
that is what i do not get
ok so 1. A=1/2h(b1+b2) 2. A = h/2(b1 + b2) (another way to write 1/2h is h/2)
now we want to multiply both sides by 2
and we get 3. 2A = h(b1 + b2)
now we want to divide both sides by h, to get rid of the h - the whole point here is trying to get b1 by itself - so we continuously perform the same operation to both sides of the equation until it's alone - since if you do the same thing be it multiple, divide, or add to both sides, you still have a valid equation
so 2A/h = h(b1+b2)/h
and since we know h/h = 1, we can get rid of h on the right side
so 2A/h = b1+b2
so now, to get b1 by itself, we need to subtract b2 from both sides
so 2A/h - b2 = b1+b2-b2
that eliminates the b2 on the right side, and leaves b1 alone
sp 2A/h - b2 = b1, or b1 = 2A/h - b2
ok i am starting to get it
but as far as the options go on your multiple choice - I don't see any that match
ok i will contact my techer
ok sorry =(
you could try inputting different values for b1 and b2
and see which answer matches the from the choices and the original equation
but I would do it with our answer first
and see if they match up to the original area equation
if different values of b1,h, and b2 are always equal for our answer, it's almost certianly correct
and yeah, ask your teacher. worst case we're wrong and you have bonus points
ok that would be cool lol
thx for helping me