Respuesta :

using soh cah toa

opp=4

hyp=r

we are using soh

therefore sin45=4/r

rsin45=4

r=4/sin45

r=5.7 approx

Answer:

  = 5.657 units

Step-by-step explanation:

Using the trigonometric ratio; sine

Sine Ф = opp/Hyp

Opposite = 4 and Hypotenuse and Ф=45°

Sine 45° = 4/r

  r = 4/sine 45

    = 5.657 units