Question

Which of the following are measurements of the sides of a right triangle?
A. 25, 23, 7
B. 9, 6, 3
C. 18, 15, 4
D. none of the above

Answer 1

D

Answer 2

for a right angled triangle the square on the longest side = sum of the squares on the other 2 sides

Answer 3

A right angle equals 90 degrees... add them the numbers up to see which answer has the sum of 90 degrees

Answer 4

if its D then 18^2 = 15^2 + 4^2

check that out

Answer 5

i did @welshfella

Answer 6

and what did you get?

Answer 7

18

Answer 8

for the final answer because i had 324 and took the square root of that and got 18

Answer 9

??

did 18^2 = 15^2 + 4^2?

Answer 10

its none of the above try them all none will work

Answer 11

18^2 = 324
15^2 = 225
4^2 = 16

now does the sum of the last 2 equal 324?

Answer 12

yes

Answer 13

??
225 + 16 = 241
- not 324

Answer 14

yes thats what i got not 324 because i wrote it out on scratch paper and had that the second time. the first time i had gotten 324

Answer 15

do you see that this cannot be a right angled triangle because the numbers dont fit the pythagoras theorem?

Answer 16

yes, so it would be D

Answer 17

right

Answer 18

Thank You! :)

Answer 19

Wanna help me with another one?

Answer 20

sorry - I made a mistake when I said if its D - i should have said if its C (in my second post)

Answer 21

yea ok

Answer 22

Which of the following are measurements of the sides of a right triangle?
101, 99, 20
28, 26, 12
17, 14, 6
none of the above

Answer 23

Add them

Answer 24

For example : Add 100+99+20 and see if it gets you 90

Answer 25

again you have to go throgh each one and see if they fit pythagoras
eg 100^2 = 99^2 + 20^2 ?

Answer 26

okay

Answer 27

so if i get 90 as my final answer then it is the answer?

Answer 28

no - its not adding the numbers - you add the SQUARES of the numbers

Answer 29

yes. Add the squares

Answer 30

how do i know which is the hypotenuse?

Answer 31

its the longest side

Answer 32

i'll do one for you
100^2 = 10000

99^2 = 9801
20^2 = 400

9801 + 400 = 10201 so its not a right angle triangle

Answer 33

i did the first one i added the square of 99 and got 9801 then added that with the square of 20 which was 400 and together those equaled 10201 and the sum of 101 squared was 10201

Answer 34

yes good

Answer 35

okay so the next one now

Answer 36

so the first one cannot be right angled

Answer 37

now do the same calculations on the other 2

Answer 38

okay brb

Answer 39

so i got 820 for the sqaure of 26 and square of 12. Then i got 784 for the square of 28

Answer 40

`right

Answer 41

so is the second set a right angled triangle or not?