3 years ago

What is the length of the arc shown in red?

Mathematics

1 answer:

professor190 [17]3 years ago

3 0

Answer:

≈ 18.8 cm

Step-by-step explanation:

The arc length is calculated as

arc = circumference of circle × fraction of circle

The central angle is equal to the arc subtending it, that is 60°

arc = 2πr × $\frac{60}{360}$

= 2π × 18 × $\frac{1}{6}$

= 36π × $\frac{1}{6}$

= 6π ≈ 18.8 cm ( to 1 dec. place )

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What is the length of the arc shown in​ red?

What is the length of the arc shown in red?