Answer:
Step-by-step explanation:
diameter = 42 mm
radius (r) = 42/2 = 21mm
SA of semicircle = 3πr²
Answer:1385.44mm sq
Step-by-step explanation: surface area of a circle = pi x radius squared
3.142 x 21 squared
Procedures:
½÷3=0.17
if you're talking about the app, i don't get too
that not 20 point that 10
Answer: A
im sure
