35/5= 7 cm so we have found ''d'' of a circle. R=1/2 d =3.5 cm
The triangle base contains of three full circles 3*7=21 cm + 2 half circles which make a full one =7
AB= 7+21=28 CM
To find the height CH (Name the triangle ABC and the height CH) we do the same calculation. 2 half circles= 1 full + 1 full = 2 full = 2*7=14 cm.
The area is : AB*CH/2 = 28*14/2= 196 cm 2
I hope you understood because it's not the way I am used to explain Math exercises, because of my native Albanian language :)