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Difficulty: 3 of 5 Latest: Three Centroids (in Geometry)

  
Let parallelogram ABCD have point P on side BC.
Let K, L, and M be the centroids of triangles
PBA, PAD, and PDC respectively.

Prove that [BCMK] = [AKL] + [DLM], where

   [·] denotes area of polygon.
  
(No Solution Yet, 0 Comments) Submitted on 2015-05-28 by Bractals   
Difficulty: 3 of 5 Bonus: Euclid Squared (in Sequences) Rating: 4.00
What are the next two numbers in this sequence?

2, 5, 13, 31, 61, 109, ??, ??

(Solution Posted, 4 Comments) Submitted on 2006-01-26 by Dan   
Difficulty: 1 of 5What property? (in Shapes)
Posted on 2015-05-28 by Ady TZIDON (No Solution Yet, 4 Comments)
Difficulty: 3 of 5A many chords problem (in Geometry)
Posted on 2015-05-27 by Jer (No Solution Yet, 0 Comments)
Difficulty: 2 of 5Angle Ratio Ascertainment (in Shapes)
Posted on 2015-05-27 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 4 of 5Chacun pense à soi (in Just Math)
Posted on 2015-05-26 by Ady TZIDON (No Solution Yet, 3 Comments)
Difficulty: 2 of 5Tax Collector (in Games)
Posted on 2015-05-26 by Ady TZIDON (No Solution Yet, 5 Comments)
Difficulty: 3 of 5All possible polynomials puzzle (in Just Math) Rating: 4.00
Posted on 2015-05-25 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 2 of 5Homophone Hindrance (in Word Problems)
Posted on 2015-05-25 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 3 of 5Sinusoidal System (in Just Math)
Posted on 2015-05-24 by Jer (No Solution Yet, 0 Comments)
Difficulty: 3 of 5Proper Power Poser (in Just Math)
Posted on 2015-05-23 by K Sengupta (No Solution Yet, 1 Comments)
Difficulty: 3 of 5No neighbors allowed (in Numbers)
Posted on 2015-05-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 2 of 5One, two, eight etc (in Numbers)
Posted on 2015-05-22 by Ady TZIDON (Solution Posted, 2 Comments)
Difficulty: 3 of 5Cuboid Concern (in Shapes)
Posted on 2015-05-21 by K Sengupta (No Solution Yet, 2 Comments)
Difficulty: 2 of 5Back to throne (in Probability)
Posted on 2015-05-21 by Ady TZIDON (Solution Posted, 3 Comments)
Difficulty: 3 of 5Powered s.o.d. (in Numbers) Rating: 3.00
Posted on 2015-05-20 by Ady TZIDON (No Solution Yet, 2 Comments)

Recently Posted Solutions:
Difficulty: 2 of 5One, two, eight etc (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2015-05-25 04:04:50
Difficulty: 2 of 5Name the location (in Word Problems)
Submitted By Ady TZIDON. Solution posted on 2015-05-25 03:48:14
Difficulty: 2 of 527-8=19 (in Just Math)
Submitted By Ady TZIDON. Solution posted on 2015-05-25 03:25:38
Difficulty: 3 of 5No neighbors allowed (in Numbers)
Submitted By Ady TZIDON. Solution posted on 2015-05-24 11:32:00
Difficulty: 2 of 5Back to throne (in Probability)
Submitted By Ady TZIDON. Solution posted on 2015-05-24 11:24:03
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