Question

whats A= 1/2d1d2

Answer 1

Do you mean
\[ A = \frac{d_1\ d_2}{2} \]?
that looks like a formula to find the area of a rhombus, using the lengths of its diagonals

Answer 2

Yes that is what I mean, thanks. I just got the homework today and have 3 problems left

Answer 3

@phi

Answer 4

what is the question?

Answer 5

solve for d1 @phi

Answer 6

start with
\[ A = \frac{d_1\ d_2}{2} \]
multiply both sides by 2 (that means write *2 on both sides)
what do you get ?

Answer 7

2A= d1 d2 because the other 2 crosses it out @phi

Answer 8

you get 2/2 d1 * d1
and 2/2 is 1
and 1*d1*d2 is just d1*d2

so yes
2A = d1 d2
now divide both sides by d2

Answer 9

2A/ d2= d1 ?? @phi

Answer 10

\[ d_1 = \frac{2A}{d_2} \]

Answer 11

Okay, thanks man really helped out , I just joined the program and i already like it! @phi

Answer 12

it uses the idea that d2/d2 is 1 (anything divided by itself is 1)
and because it's an equation, we divide both sides by d2