If two distinct planes intersect, then their intersection is a line. which geometry term does the statement represent

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

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?

Fast! find the length of cu. the triangles are similar. show your work.