Question

Which equation gives the length of the altitude of AABC?

C
A
OC. AD=
D
B
OA. AD= √AC + AB²
OB. AD=CD.BD
CD
ВО
OD. AD= √CD + BD

Answer 1

when running a line, in a right-triangle, from the 90° angle perpendicular to its opposite side, we will end up with three similar triangles, one Small, one Medium and a containing Large one.

Check the picture below.

`\cfrac{AD}{BD}=\cfrac{CD}{AD}\implies AD^2=CD\cdot BD\implies AD=√(CD\cdot BD)`