Join TSR now and get all your revision questions answeredSign up now
    • Thread Starter
    Offline

    0
    ReputationRep:
    a brooch has the shape of a sector of a circle of radius 4 cm. the perimeter of the brooch is 11 cm. calculate the area of the brooch. help please don't you need size of an angle to work it out.
    • Thread Starter
    Offline

    0
    ReputationRep:
    I think I worked it out is it 6cm2
    Offline

    17
    ReputationRep:
    (Original post by hanna151)
    a brooch has the shape of a sector of a circle of radius 4 cm. the perimeter of the brooch is 11 cm. calculate the area of the brooch. help please don't you need size of an angle to work it out.
    You can find the angle from the information given

    The perimeter is the distance all the way around the brooch and is 11cm, the radius of the circle is 4 cm so you can deduce the arc length
    From that you can work out the angle and hence the area
    • Thread Starter
    Offline

    0
    ReputationRep:
    thank you
    Offline

    0
    ReputationRep:
    have you done the c1 exam in january?
 
 
 
Poll
Which Fantasy Franchise is the best?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.