1st Task:
x is 180-(51+90)=39 because a Triangle always has 180 degrees
The area is (9,4*2*6,2)/2=58.28 [cm^2] because you can take the ground line twice and use the normal formular for a triangle's area a=1/2*g*h
2nd task
x is 180-(62+37)=71 like its already explained above
The Area here is 1/2*46.12*4.7=108.382 [m^2] by using 1/2*g*h
And to be honest i dont know what Type means im not english :D