
Geometry Geometry Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 8th, 2009, 02:27 PM  #1 
Newbie Joined: Jan 2009 Posts: 3 Thanks: 0  Pythagorean Theorem HELP PLEASE!!!!!!! ASAP
The ratio w/h = 4/3 Here, k is a scale factor. When the sides of the screen are w=4k and h=3k, then we still get the ratio w/h= 4k/3k= 4/3 Use the Pythagorean Theorem (a^2 + b^2 = c^2) to find some of the quantities below. This is what I had for part a, but I dont understand how the others are being explained. I did what I could, but Im sure if its correct. a) If w = 4 and h = 3, then d = ___5__ (Use Pythagorean Theorem to find a numerical value for d.) b) If w = 4k and h = 3k, then d = ____k= 4^2+3^2=c^2___________ (Use Pythagorean Theorem to find a formula for d in terms of k.) c) Solve for k in terms of d: k = ___4^2+3^2=k^2___K^2=25__________ (Now rearrange the formula from part b) and solve for k in terms of d.) d) If d = 32, then k = ___________ (Use the formula in part c).) h = ________________ (h = 3k) w = ________________ (w = 4k) 
April 8th, 2009, 05:20 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,270 Thanks: 1958 
You should effectively use the Pythagorean Theorem a² + b² = c², but with w, h, and d instead of a, b, and c, respectively. Hence, for example, when w = 4k and h = 3k, (4k)² + (3k)² = d², i.e., 25k² = d², so d = 5k. You should be able to finish correctly now. 

Tags 
asap, pythagorean, theorem 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
How would You get to Pythagorean theorem  Skyer  New Users  11  August 1st, 2011 06:15 AM 
Pythagorean theorem  johnny  Geometry  10  September 20th, 2010 05:32 PM 
pythagorean theorem  moonrains  Geometry  2  January 7th, 2009 04:46 PM 
new Pythagorean theorem  mohanned karkosh  Geometry  1  October 22nd, 2007 06:13 AM 
Pythagorean Theorem  johnny  Calculus  2  September 17th, 2007 01:45 PM 