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notsponge [240]
3 years ago
6

How dot figure out the perimeter of Question 2, a

Mathematics
1 answer:
lora16 [44]3 years ago
7 0

Answer:

51.96 mm

Step-by-step explanation:

Perimeter of circle = 2 × pi × r

Perimeter of small circle

= 2 × 3.14 × 10/2

= 31.4 mm

half of perimeter of small circle = 31.4/2 = 15.7 mm

Perimeter of large circle

= 2 × 3.14 × (5+4)

= 2 × 3.14 × 9

= 56.52

half of perimeter of large circle = 56.52/2 = 28.26 mm

All line = half line small circle + half line large circle + (4 × 2)

All line = 15.7 + 28.26 + 8

= 51.96 mm

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