Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    Stuck on this question ... Anybody can help ... Need working to be shown .. Many thanks in advance
    Attached Images
     
    Offline

    16
    ReputationRep:
    (Original post by Saj2830)
    Stuck on this question ... Anybody can help ... Need working to be shown .. Many thanks in advance
    What sixth form course is this?

    Similar triangles is a GCSE topic.
    Offline

    15
    ReputationRep:
    Cd/be = ac/bc
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by Arithmeticae)
    Cd/be = ac/bc
    Can you please elaborate .... Thanks
    Offline

    16
    ReputationRep:
    (Original post by Saj2830)
    Can you please elaborate .... Thanks
    How much of an elaboration do you need - in similar triangles the ratio of corresponding sides is the same
    Offline

    0
    ReputationRep:
    21.6/12 = 1.8 = ac / bc

    ac / 10 = 1.8

    ac= 1.8 x 10 = 18
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TenOfThem)
    How much of an elaboration do you need - in similar triangles the ratio of corresponding sides is the same
    So ... X = 12.5 cm
    Offline

    0
    ReputationRep:
    (Original post by Saj2830)
    So ... X = 12.5 cm
    No, x = 8

    18 - 10 = 8
    Offline

    16
    ReputationRep:
    (Original post by Saj2830)
    So ... X = 12.5 cm
    Not sure where you got that from


    Can you see the 2 triangles


    What is the enlargement factor from the small triangle to the large one?

    Can you apply that to the length of 10 so you get the corresponding length in the large triangle?
    Offline

    15
    ReputationRep:
    (Original post by Saj2830)
    So ... X = 12.5 cm
    No, where did you get that from?

    The scale factor between the triangle is 1.8...

    Posted from TSR Mobile
    Offline

    16
    ReputationRep:
    (Original post by Arithmeticae)

    The scale factor between the triangle is 10...
    :confused:
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by LouiseR1996)
    No, x = 8

    18 - 10 = 8
    Thank you
    Offline

    15
    ReputationRep:
    (Original post by TenOfThem)
    :confused:
    Whoops, no idea what happened there. Major typo on my behalf

    Posted from TSR Mobile
    Offline

    16
    ReputationRep:
    (Original post by Saj2830)
    Thank you
    Do you understand why?
    • Thread Starter
    Offline

    0
    ReputationRep:
    (Original post by TenOfThem)
    Do you understand why?
    Yes , makes sense now ... Thanks all !!!
    Offline

    16
    ReputationRep:
    (Original post by Saj2830)
    Yes , makes sense now ... Thanks all !!!
    k

    that's good then
 
 
 
  • See more of what you like on The Student Room

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

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
    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
  • See more of what you like on The Student Room

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

  • 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.