# C2 questionWatch

Announcements
#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?
0
3 years ago
#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.
0
3 years ago
#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
0
#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?
0
#5
(Original post by ghostwalker)
The method is sound, BUT OBAC is not a square, it's a rhombus.
oh i see, thankyou
0
3 years ago
#6
(Original post by alesha98)
oh i see, thankyou
Sorted now, or do you still need the area of the rhombus?
0
#7
(Original post by ghostwalker)
Sorted now, or do you still need the area of the rhombus?
I am good now, thankyou so much
0
3 years ago
#8
(Original post by alesha98)
I am good now, thankyou so much
0
X

new posts

### 2,474

people online now

### 225,530

students helped last year
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• University of Dundee
Mon, 26 Aug '19
• University of Aberdeen
Tue, 27 Aug '19
• Norwich University of the Arts
Sat, 31 Aug '19

### Poll

Join the discussion

#### How are you feeling about GCSE Results Day?

Hopeful (212)
12.76%
Excited (148)
8.91%
Worried (302)
18.18%
Terrified (374)
22.52%
Meh (151)
9.09%
Confused (36)
2.17%
Putting on a brave face (228)
13.73%
Impatient (210)
12.64%