Question

Place numbers 1 to 9. One in each circle so that the sum of the four numbers along of
any three sides of the triagle is 20. There are nine circle and 9 numbers to place in the
circles. Each circle must contain number in it

Answer 1

If you google "magic triangle" you will find your answer.

Answer 2

one side contain 5,6,7,2 and opposite side started form 2,9,1,8 and the bottom 5,3,4,8