SUMADO

There is a set of circles joined by lines that form squares and triangles.
In the circles or vertices of each figure a different number has been assigned between one and nine.
In each figure the resulting sum of the corresponding vertices is shown.
The object of the game is to deduce the values assigned to each circle. The values of two vertices are given as help.

Requires the exercise of logic and a minimum knowledge of arithmetic to be solved: adding.