What us ecstasy , callous and counterpart​

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?