3 years ago

A circle with circumference 20 has an arc at 72 central angle. what is the length of the arc

Mathematics

1 answer:

Vsevolod [243]3 years ago

5 0

Answer:

4 units

Step-by-step explanation:

$\because \: l = \frac{ \theta}{360 \degree} \times c \\ \\ \therefore \: l = \frac{72 \degree}{360 \degree} \times 20 \\ \\ \therefore \: l = \frac{72 \degree}{18\degree} \\ \\ \therefore \: l = 4 \: units$

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