Mathematics: 13x+20+ 32 +9 i still dont get the answer

13x+20+ 32 +9 i still dont get the answer

Dweath50

09.01.2022

13X+61

Step-by-step explanation:

13X+20+32+9

13X+61

you add all the same numbers without the variable

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carolhubble

21.04.2020

Length of an arc is given by:

$l = r \theta$

where,

r is the radius of the circle

$\theta$ is the angle in radian.

As per the statement:

A circle has a radius of 12.6 cm.

⇒r = 12.6 cm

It is also given that: a central angle measuring 120°.

Use conversion:

1 degree = $\frac{\pi}{180}$

then;

120 degree = $120 \cdot \frac{\pi}{180} = \frac{\pi}{1.5}$

⇒ $\theta = \frac{\pi}{1.5}$

then;

$l = r \theta$

Substitute the given values we have;

$l = 12.6 \cdot \frac{\pi}{1.5} = 8.4 \pi$ cm

therefore, the exact length of an arc is, $8.4 \pi$ cm

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