Question

Help, picture attached.

Answer 1

Length AB in term of x is = 80-2x.cos60
= 80-x
h in terms of x is = x.sin60

Answer 2

b and c I should be able to figure out but can u explain
Length AB in term of x is = 80-2x.cos60
= 80-x

Answer 3

ok you know the lenght of sheet is 80 cm

Answer 4

don't worry, I figured it out.

Answer 5

ok

Answer 6

but shouldn't it be 2(x times cos60)

Answer 7

it should be because i m considering both triangle sides

Answer 8

kk, and the answer is 80 - 2x from the textbook.

Answer 9

xcos60+xcos60 = x/2+x/2 = x

Answer 10

=2x not x I believe.

Answer 11

this is the combine lenght of both the triangle's sides
now subtracting it from 80 should result in 80-x not in 80-2x

Answer 12

wait, how does xcos60=x/2 ?

Answer 13

cos60 = 1/2
xcos60= x/2

Answer 14

@kropot72 are u sure?

Answer 15

Yes, I am sure. This checks with the given answer.