HELP. maths problems!

• nubcake

  3 May 07, 22:06

  This question:
  
  Each interior angle of a regular polygon is 36 degree greater than each exterior angle of the same polygon. Calculate the number of sides of the polygon.
  
  How to do??
  
  And, whats the difference between a polygon and pentagon?
  
  Thanks!!
• popikachu

  3 May 07, 22:10

  Originally posted by nubcake:

  This question:
  
  Each interior angle of a regular polygon is 36 degree greater than each exterior angle of the same polygon. Calculate the number of sides of the polygon.
  
  How to do??
  
  And, whats the difference between a polygon and pentagon?
  
  Thanks!!

  180-36= 144
  144 / 2 = 72 (exterior angle)
  
  360 / 72 = 5 (number of side of polygen)(total exterior angle = 360degree)
  
  am i correct?
• popikachu

  3 May 07, 22:11

  if i am not wrong, pentagen is a polygen and just like square is also a polygen...
  hextegen also a poly...
  
  am i correct?
• popikachu

  3 May 07, 22:12

  i know my spelling very lan >.<
• ^tamago^

  3 May 07, 22:12

  interior = 108°
  exterior = 72°
  
  360°/72°= 5
• AdAptAliS

  3 May 07, 22:14

  What level is this? Just to check if some of the concepts have been learnt
  
  It actually isn't that hard if you use the rule of the sum of all exterior angles.
  
  I think its a 5-sided figure so its a pentagon.
  
  Polygon - any complete figure (triangle, square, rectangle)
  Pentagon - 5 sided figure
• ^tamago^

  3 May 07, 22:15

  lower sec.......
• MyPillowTalks

  3 May 07, 22:17

  u sec 2 right?
  
  pentagon ish in ur text book if u are in sec 2
• popikachu

  3 May 07, 22:21

  if i am not wrong, it is sec 2 de work...
  
  cus sec 3 and 4 no teach this de...
  
  this chapter main things are
  
  total exterior angle = 360
  
  (n-2)x180= total interior angle
  
  [(n-2)x180] / n = angle of a interior side...
• nubcake

  3 May 07, 22:21

  Thanks for all the help!
  
  Anyway im sec4 this yr but ive been sleeping in math lessons since sec1, thats why alot dunno..
• nubcake

  3 May 07, 22:22

  Another noob question..
  
  If 5 men work 10 hours per day to complete a house renovation in 4 days, how many days will 8 men take if they work 5 hours per day?
• popikachu

  3 May 07, 22:27

  Originally posted by nubcake:

  Another noob question..
  
  If 5 men work 10 hours per day to complete a house renovation in 4 days, how many days will 8 men take if they work 5 hours per day?

  statatics....
  
  5men >10 h 4 days
  
  5 men > 40h
  
  1 men > 200 h
  
  8 man > 200/8 = 25h
  
  8 man > 5 hours a day need 5 days...
• Darkness_hacker99

  3 May 07, 22:28

  Originally posted by nubcake:

  This question:
  
  Each interior angle of a regular polygon is 36 degree greater than each exterior angle of the same polygon. Calculate the number of sides of the polygon.
  
  How to do??
  
  And, whats the difference between a polygon and pentagon?
  
  Thanks!!

  polygon is an object with sides of the same angle.
  
  Pentagon is a polygen with 5 sides.
• popikachu

  3 May 07, 22:28

  statatics is sec 3 de first topid of the year...
  
  wake up dude go buy a 10 year series and start learning!
  10 year series damn good... better then textbook 1 mil time...
• Darkness_hacker99

  3 May 07, 22:29

  Originally posted by nubcake:

  Another noob question..
  
  If 5 men work 10 hours per day to complete a house renovation in 4 days, how many days will 8 men take if they work 5 hours per day?

  Jia you for your maths. Read here for motivation.
  
  http://www.sgforums.com/?action=thread_display&thread_id=252111
• ^tamago^

  3 May 07, 22:33

  Originally posted by nubcake:

  Another noob question..
  
  If 5 men work 10 hours per day to complete a house renovation in 4 days, how many days will 8 men take if they work 5 hours per day?

  how to pass ur national exams?
• nubcake

  3 May 07, 22:36

  I see.. Um, got stuck on another question
  
  On a map whose scale is 1:50000, the area of a field is 12 cm square. Calculate the area representing this field on a map whose scale is 1:20000.
• cApitaland

  3 May 07, 23:37

  12 times 50000 squared to find actual area? den divide by 20000 squared to find area represented in that map?
• popikachu

  3 May 07, 23:43

  Originally posted by nubcake:

  I see.. Um, got stuck on another question
  
  On a map whose scale is 1:50000, the area of a field is 12 cm square. Calculate the area representing this field on a map whose scale is 1:20000.

  i dun understand this question...
  
  did you type wrongly?
• nubcake

  4 May 07, 15:51

  Solved it already.
  
  Today's emaths paper was a killer though, argh