Question

Screen shot math question help please!

Answer 1

http://tinypic.com/view.php?pic=16bxzit&s=6

Answer 2

Try using Pythagoras, if it works then it is a 90 degree angle because Pythagoras' theorem only works for right-angled triangles.

Answer 3

can you help me with that please?

Answer 4

Pythagoras' theorem is \[a ^{2}+b^{2}=c^{2}\] where c is the length of the longest side (the hypotenuse) and a and b are the lengths of the other sides.

Answer 5

so a would be 12 squared and b would be 15 squared?

Answer 6

yes :)

Answer 7

then what do i do after that??

Answer 8

check if 12 squared plus 15 squared is equal to the long side (19) squared.

Answer 9

its not. cuz 12 squared and 15 squared is 369 and 19 squared is 361

Answer 10

right?

Answer 11

yes that's right. so that means it's not a 90 degree angle :)

Answer 12

okay thankyou :))

Answer 13

you're welcome