MATH SOLVE

4 months ago

Q:
# Can someone pls help me with diagram 2 I'm confused about how I'm supposed to find the number for the corners like the other two diagrams.

Accepted Solution

A:

Isn't that interesting? What a neat little problem.

The middle number between a and b = (a + b)/2

The middle number between b and c = (b + c) / 2

The middle number between c and d = (c + d)/2

The middle number between d and a = (d + a)/2

The sum of the numbers in the corners of

diagram 1 =Β a + b + c + d Do you agree.

Now look at diagram two. Start by putting a, b, c and d in the corners.

Now remove the brackets from what I found above.

diagram 2 = a/2 + b/2 + b/2 + c/2 + c/2 + d/2 + d/2 + a/2 Now collect all the like terms.

diagram 2 = a/2 + a/2 + b/2 + b/2 + c/2 + c/2 + d/2 + d/2

a/2 + a/2 = a does it not?

b/2 + b/2 = b

c/2 + c/2 = c

d/2 + d/2 = d

The sum of the middle numbers in diagram 2Β = a + b + c + d

But that's the same sum as diagram 1, which was what you were asked to prove. You cannot come up with a counter example that will give a different result, at least in the positive integers.

The question provides you with room for a written answer. You are going to have to reproduce in some form what I've put in italics.

Thank you for posting.

The middle number between a and b = (a + b)/2

The middle number between b and c = (b + c) / 2

The middle number between c and d = (c + d)/2

The middle number between d and a = (d + a)/2

The sum of the numbers in the corners of

diagram 1 =Β a + b + c + d Do you agree.

Now look at diagram two. Start by putting a, b, c and d in the corners.

Now remove the brackets from what I found above.

diagram 2 = a/2 + b/2 + b/2 + c/2 + c/2 + d/2 + d/2 + a/2 Now collect all the like terms.

diagram 2 = a/2 + a/2 + b/2 + b/2 + c/2 + c/2 + d/2 + d/2

a/2 + a/2 = a does it not?

b/2 + b/2 = b

c/2 + c/2 = c

d/2 + d/2 = d

The sum of the middle numbers in diagram 2Β = a + b + c + d

But that's the same sum as diagram 1, which was what you were asked to prove. You cannot come up with a counter example that will give a different result, at least in the positive integers.

The question provides you with room for a written answer. You are going to have to reproduce in some form what I've put in italics.

Thank you for posting.