Answer:
1. A
Solution:
Find the radius
So, the radius is equal to half the diameter = = 20 cm
the area of the circle formed is equal to = 400
You can also calculate it another way:
If there are 20 congruent sectors, then each sector has a central angle of
the area of the sector is equal to the central angle of the sector divided by 360 x the area of the circle.
2. B
Since the pendant is designed in a regular octagon and the measure of a circle is 360.
So,
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Answers & Comments
Answer:
1. A
Solution:
Find the radius
So, the radius is equal to half the diameter =
= 20 cm
the area of the circle formed is equal to
= 400![\pi \pi](https://tex.z-dn.net/?f=%5Cpi)
You can also calculate it another way:
If there are 20 congruent sectors, then each sector has a central angle of![\frac{360}{20} = 18 \frac{360}{20} = 18](https://tex.z-dn.net/?f=%5Cfrac%7B360%7D%7B20%7D%20%3D%2018)
the area of the sector is equal to the central angle of the sector divided by 360 x the area of the circle.
2. B
Solution:
Since the pendant is designed in a regular octagon and the measure of a circle is 360.
So,