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C2 question watch

1. for the area of the badge (part b), can i work out the area of a square OBAC then subtract the area of the sector OBC? So the area of the square is 64mm^2 and the area of the sector is 28.8mm^2. So the area of the badge is 35.2mm^2?
2. (Original post by alesha98)
for the area of the badge (part b), can i work out the area of a square OBAC then subtract the area of the sector OBC? So the area of the square is 64mm^2 and the area of the sector is 28.8mm^2. So the area of the badge is 35.2mm^2?
The method is sound, BUT OBAC is not a square, it's a rhombus.
3. (Original post by alesha98)
for the area of the badge (part b), can i work out the area of a square OBAC then subtract the area of the sector OBC? So the area of the square is 64mm^2 and the area of the sector is 28.8mm^2. So the area of the badge is 35.2mm^2?
Yes by working out the area of the two triangles that make up OBAC
4. (Original post by ghostwalker)
The method is sound, BUT OBAC is not a square, it's a rhombus.
Oh ... thankyou, so how can i find the area of the badge? Is the area of the rhombus still 8x8?
5. (Original post by ghostwalker)
The method is sound, BUT OBAC is not a square, it's a rhombus.
oh i see, thankyou
6. (Original post by alesha98)
oh i see, thankyou
Sorted now, or do you still need the area of the rhombus?
7. (Original post by ghostwalker)
Sorted now, or do you still need the area of the rhombus?
I am good now, thankyou so much
8. (Original post by alesha98)
I am good now, thankyou so much

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