gimana? tolong bantuu

5.b) AB = √AC²-BC²
AB = √10²-8²
AB = √100-64
AB = √36
AB = 6
Diameter = 6
kel. = 3.14 x 6 = 18.84

5.a) trypel phitagoras = 3.4.5
kel. = 3.14 x 5 = 15,7