5 A circle has a radius of 12 in. Find an exact value for each measurement. (Hint: Use arc length formula to find angle) a) an arc length with a central angle of 90°:
b) the area of a sector with a central angle of 90°:​

--- arc length

--- sector area

Step-by-step explanation:

Given

Solving (a): The arc length

This is calculated using:

So, we have:

Solving (b): The sector area

This is calculated using:

So, we have:

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d

step-by-step explanation:

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )