Answer:
b = 1.7
c = 7.1
Explanation:
the triangle with side 'b' is a 30-60-90° Δ where the ratio of sides, respectively, are 1 :
: 2
to find 'b' we could set up this proportion:
b/3 = 1/

cross-multiply:
b
= 3
b = 3 /

if we rationalize the denominator, this becomes (3
)/3 which is
or 1.7
the other triangle is a 45-45-90°Δ where the ratio of the sides are 1 : 1 :

if the legs are 5 then the hypotenuse is 5
or 7.1