A house has a floor area of 104 m^2 and an outside wall that has an area of 27 m^2. The earth's magnetic field here has a horizontal component of 3.00 x 10^-5 T that points due north and a vertical component of 3.40 x 10^-5 T that points straight down, toward the earth.

(a) Determine the magnetic flux through the wall if the wall faces north.

in Wb (weber)

(b) Determine the magnetic flux through the wall if the wall faces east.

in Wb (weber)

(c) Calculate the magnetic flux that passes through the floor.

in Wb (weber)

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i know that flux = B*A*cos(angle) will give the answer in Weber.

however, i'm not sure what angles to use? Also, if i have to use components to get the angles.

please show the example.

thankyou.