find the area of a 30 degree circle r or d. round to the nearist whole number.
1.r=2m
2.r=35in.
3.d=50cm
4.d=10ft.
CAN YOU PLEASE HELP ME!!!!!!!!!
A=r^2*pi
A=d^2*pi/4
30°/360°=30°/(12*30°)=1/12
A1= area of a 30°degree circle
A1=r^2*pi/12=0.2618*r^2
A1=(d^2*pi/4)/12=d^2*pi/48=0.06545d^2
1. r=2m
A1=0.2618*r^2=02618*2^2=0.2618*4=1.0472m^2
rounded A1=1 m^2
2. r=35in
A1=0.2618*r^2=A1=0.2618*35^2=A1=0.2618*1225=320.705in^2
rounded A1=321 in^2
3. d=50cm
A1=0.06545d^2=0.06545*50^2=0.06545*2500=163.625cm^2
rounded A1=164 cm^2
4. d=10ft
A1=0.06545d^2=A1=0.06545*10^2=A1=0.06545*100=6.545ft^^2
rounded A1=7 ft^^2