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107
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https://vle.mathswatch.co.uk/vle/assignment/2975264/16352

https://vle.mathswatch.co.uk/vle/assignment/2975264/9786

 Mar 28, 2020
 #1
avatar+1970 
+1

I'd love to.... however, I can only get in if I have an account. ARG! Do you mind posting the problems here?

 Mar 28, 2020
 #2
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0

https://vle.mathswatch.co.uk/images/questions/question16352.png

https://vle.mathswatch.co.uk/images/questions/question9786.png

Guest Mar 28, 2020
 #3
avatar+1970 
+1

Okay, thanks!

 

Here's a hint.

 

We need to use the Pythagorean Theorem to figure out the lengths of all of the side lengths. Then, add the side lengths and then multiply that by 2.5. Tell me what you get, and I will check it. :D 

 Mar 28, 2020
 #4
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0

12^2=144

5^2=25

144+25=169

13x2.5=32.5

Guest Mar 28, 2020
 #5
avatar+109527 
0

I'm confused.

guest, were you responding to Cal?

Yes it is definitely a Pythorean question 

 BUT

Why is anyone multiplying by 2.5?

 

Here is the question:

Here is the answer:

Pythagoras's Theory

In any triangle, if the square on the longest is equal to the sum of the squares on the other 2 sides then the triangle MUST be right angled.

 

In this triangle, the square on the longest side is 13^2 = 169

and

the sum of the squares on the other two sides is  5^2+12^2= 25+144 = 169

since they are equal this has to be a right-angled triangle.

 Mar 29, 2020

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