Respuesta :

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