Respuesta :

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]

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