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 August 14th, 2018, 11:07 AM #1 Member   Joined: Aug 2018 From: Warrington Posts: 50 Thanks: 1 Perimeter Another tent has the perimeter of 7.2 metres. If the width is 1.3 metres, what is the length?
 August 14th, 2018, 11:54 AM #2 Global Moderator   Joined: Dec 2006 Posts: 19,888 Thanks: 1836 The semiperimeter is 3.6 m, so the length is (3.6 - 1.3) m, i.e. 2.3 m.
August 14th, 2018, 12:32 PM   #3
Math Team

Joined: Oct 2011

Posts: 13,489
Thanks: 950

Quote:
 Originally Posted by sezwillow84 Another tent has the perimeter of 7.2 metres. If the width is 1.3 metres, what is the length?
Can you tell us WHY you're still having problems with these
basic perimeter problems?

 August 14th, 2018, 12:54 PM #4 Member   Joined: Aug 2018 From: Warrington Posts: 50 Thanks: 1 I don't know why I am having problems with these problems but can't get my head around it
 August 14th, 2018, 01:33 PM #5 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,489 Thanks: 950 Code: A 10 B 6 6 D 10 C Above is rectangle ABCD, with dimensions 6 by 10; ok? It's area is 6 * 10 = 60 sq. units; ok? (notice that * is now used as multiplication sign...NO longer x) It's perimeter is 6 + 10 + 6 + 10 or 2*(6 + 10) = 2*16 = 32; ok? IF you're told width = 6 and perimeter = 32, length L is calculated this way: L + L + 6 + 6 = 32 2*L = 32 - 6 - 6 2*L = 32 - 12 2*L = 20 L = 20/2 = 10 ; ok? Clear? Any questions?

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