On #29 x = 12 and <apb = 90° and <dcb = 40° and on #30 all I dont even understand, sorry
A= 30ft, because you only have to multiply LxW= A that is equal to 2x15=30ft
No.d
37,619
I hope that this helps you and please mark me as the brainliest.
So.... notice the picture below
now, we know what the "height" or "altitude" is
now, we also know the perimeter is 18cm
so, k + k + b = 18
or 2k + b = 18
thus

so... one can say that

and you can simplify it if you wish.. not sure you have to