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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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Aliun [14]
We know that

If a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment. (Intersecting Secant-Tangent Theorem)

so

ST²=RT*QT

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QT=23+7-----> 30 in

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the answer is

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Answer:

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