I will give brainlest so hurry and points 20
And please show your work



1) 8
reason: radius is diameter divided by two, 16/2
2) 6
reason: diameter is radius times two, 3 × 2
3) 87.92
reason: circumfrence is pi times diameter, 28 × 3.14
4) 31.4
reason: circumfrence is pi times diameter, 10 × 3.14
6) 61.12
reason: 10 + 10 +8+8= 36 8×3.14= 25.12 36 + 25.12= 61.12
7) 69.0172
reason: 7^2× 3.14= 69.0172
8) 346.185
reason: 21÷2= 10.5 3.14×10.5^2= 69.0172
Answer:
Step-by-step explanation:
1. The radius of a circle is half the diameter 16/2=8ft
2. The diameter of a circle is double the radius so 3*2=6m
3. [tex]C=2\pi r=2*\pi *14=87.96ft[/tex] this i your circumference formula
4. [tex]C=2\pi r=2*\pi *5=31.42mm[/tex]
5. [tex]C=\pi r=\pi *6=18.85mi[/tex]
6. (semicircle) [tex]C=\pi 4=12.57cm[/tex]
(rectangle) = [tex]P=2(l+w)=2*(10+8)=36[/tex]
add both together [tex]12.57+36=48.57cm[/tex]
7. [tex]A=\pi r^2=\pi 7^2=153.94ft^2[/tex]
8. [tex]A=\pi r^2=\pi 10.5^2=346.36mm^2[/tex]
9. [tex]\frac{\pi r^2}{2} =\frac{\pi 4^2}{2} =25.13cm^2[/tex]
10. (semicircle) [tex]A=\frac{\pi r^2}{2} =\frac{\pi 25^2}{2} =981.75m^2[/tex]
(rectangle) [tex]A=wl=100*50=5000m^2[/tex]
add both together
[tex]981.75+5000=5981.75m^2[/tex]