Area of a major sector (1 Viewer)

[Demise]

How would you do c ii)?

 

[Timothy6340]

area of circle minus area of small sector

 

[Sy123]

So from c i

We find the radius to be:



Now since pi/5 is less than pi, the sector formed is a minor sector, so to find the major sector, we can either find the reflex angle at the centre and use the area of sector formula, or we can find area of whole cirlce minus area of minor sector.

FIRST WAY:



SECOND WAY:

 

[Demise]

So from c i

We find the radius to be:



Now since pi/5 is less than pi, the sector formed is a minor sector, so to find the major sector, we can either find the reflex angle at the centre and use the area of sector formula, or we can find area of whole cirlce minus area of minor sector.

FIRST WAY:



SECOND WAY:

I never learned about the major sector, ffs thank you so much!