Respuesta :

A = 2.1
As 3 is the hypotenuse of a 45/45/90 triangle, it is x√3. Divide 3 by √3 to get x, aka all the other sides. It will be 2.1.

D = 10
On 30/60/90 triangles, the hypotenuse is 2x.
The short leg is given, which is x. If 5 is x, then 2x is 10.