10. Construct a point on the Gibbs triangular diagram corresponding to a mixture with the following composition: $60 \% \mathrm{~A}, 30 \% \mathrm{~B}$, $10 \%$ C. (O. 117, U. 126, P. 219.)
10. Choose (Fig. 178) a point $P_{1}$ on side $C A$ such that segment $C P_{1}$ is $60\%$ of $C A$ (in other words, $P_{1}$ is the point marked with “60”). Draw a line through $P_{1}$ parallel to $B C$. Then, choose a point $P_{2}$ on $A B$ such that segment $A P_{2}$ is $30\%$ of $A B$ (in other words, $P_{2}$ is the point marked with “30”). Draw a line through $P_{2}$ parallel to $A C$. The intersection of the two constructed lines will give the desired point $K$.

![](https://cdn.mathpix.com/cropped/2024_05_21_27f86caa754616304e40g-220.jpg?height=551&width=892&top_left_y=965&top_left_x=135)

Fig. 178.