Answer:
A) 283.4mm^2
Step-by-step explanation:
Ok area of a circle
A=πr2
Radius is half of diameter
19/2=9.5
so
A=(3.14)9.5^2
A=283.385
round this nearest tenth
283.4mm^2
Answer:
area of semi circle=1/2 ×π(19/2)²=1/2 ×3.14×19²/4=1133.54/8=141.6925=151.7mm²
