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nlexa [21]
3 years ago
9

As an estimation we are told 5 miles is 8 km covert 12 km to miles

Mathematics
1 answer:
eduard3 years ago
4 0

Step-by-step explanation:

5miles=8km

? =12

5miles×12km=?×8km

60km miles=?×8km

?=60miles÷8

?=7.8miles

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For the diagram, calculate; the radius of the smaller section and the perimeter of the shape of the and;
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Answer:

a). Radius r of the small sector= 12cm

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Step-by-step explanation:

a). Radius of the big sector= 24 cm

Arc if the big sector= 20 cm

Arc of the small sector= 10 cm

For the radius r of the small sector

r/10 = 24/20

r=(10*24)/20

r= 24/2

r= 12 cm

Radius r of the small sector= 12cm

b). Perimeter of the shape

= Total length of the shape

Let's note that the other side of the sector is also the radius= 24 cm

Perimeter= 20+24+24

Perimeter of the shape= 68 cm

c) the angle

Length of arc = 2πr*(angle/360)

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Length of arc = 20cm

20= 2*3.14*24*(b/360)

(20*360)/(2*3.14*24)= b

47.7°= b

Angle= 47.7°

7 0
3 years ago
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snow_tiger [21]

Answer:

Step-by-step explanation:

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