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# C2 - Sector and Segment help watch

1. Hi can anyone help me and find out how i have done the area of the segment wrong.

Question:The sector has a radius of 5 cm and the angle between it is 34 degrees.
Work out the area of the sector and segment.

Sector:

That is what i got for the area of the sector.

Segment:

Area of segment = area of sector - area of triangle

Although apparently the answer is 2.92cm ^2
2. bump
3. (Original post by ch0wm4n)
Hi can anyone help me and find out how i have done the area of the segment wrong.

Question:The sector has a radius of 5 cm and the angle between it is 34 degrees.
Work out the area of the sector and segment.

Sector:

That is what i got for the area of the sector.

Segment:

Area of segment = area of sector - area of triangle

Although apparently the answer is 2.92cm ^2
Are you sure that the answer relates to this question?
4. (Original post by ch0wm4n)
Hi can anyone help me and find out how i have done the area of the segment wrong.

Question:The sector has a radius of 5 cm and the angle between it is 34 degrees.
Work out the area of the sector and segment.

Sector:

That is what i got for the area of the sector.

Segment:

Area of segment = area of sector - area of triangle

Although apparently the answer is 2.92cm ^2
is what you want for sector area where theta is in degrees.
5. (Original post by ztibor)
Are you sure that the answer relates to this question?
ok thanks
6. (Original post by ShahzaibMuneeb)
is what you want for sector area where theta is in degrees.
i think that is length of the arc of a sector.
7. (Original post by ch0wm4n)
i think that is length of the arc of a sector.
Nope that's:

where theta is in degrees.
8. (Original post by ShahzaibMuneeb)
is what you want for sector area where theta is in degrees.
Nope, it is over 360.

As a check, consider what your formula gives for a sector with angle at the centre of 180, i.e. half a circle.
9. (Original post by ghostwalker)
Nope, it is over 360.

As a check, consider what your formula gives for a sector with angle at the centre of 180, i.e. half a circle.
Oh, sorry, my bad, I just realised what I was doing wrong. I was assuming that formula for measuring the area of a sector was where it's actually .. which makes sense why I was getting half less in the denominator... sorry

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