top left the formula is two triangles 1/2*base*height for th triangle so we have 3*4*1/2=6*2 since we have 2 triangles and we get 12cm^ then we have 3 rectnagles all different sizes so we do 3*4=12, 5*4=20 and 4*4=16 add that plus the triangles and the surface area is 60cm^2

top right

it is the same as the above 8*6*1/2=24cm^2 and since we have two triangles and it is 48cm^2 and then add the rectangles 10*9 =90 and 6*8=48 and 8*9=72 add everything and you get 690cm^2

botom left so a hexagon is made up of 6 triangles so we will use the triangle formula which is 1/2*b*then *6 for all of them, which as i can read assuming it is the normal hexagon all sides are equal which means all triangles are the same so it is 3.46*2*1/2*12 (i broke it into 12 right angle triangles)41.52 then times 2 for both sides 83.04 then for the rectangles there are 10*4*6=240 cm^2 for all the rectanges add it together and get 280.52

bottom right follow what i did above

rectangles = 10*8*6=480cm^2

triangles = 2of them*12*4*6.928= 665.10748 which totals 1145.1074cm^2