Respuesta :

Answer:

4.5

Step-by-step explanation:

The two triangles are similar

so the equation is

[tex] \frac{a}{6} = \frac{15}{20} [/tex]

[tex]20a = 90[/tex]

[tex]a = \frac{90}{20} [/tex]

[tex]a = 4.5[/tex]
a/15 =6/20
a = 15x6 /20 = 4.5
Using pythagoreas :
Xy= 7.5
And rq = 25