Question 230346
Use trigonometry ratios, Sine and Cosine. 

Remember that Sine(angle) = Opposite/Hypotenuse and Cosine(angle) = Adjacent/Hypotneuse.

Let the other 2 sides of the triangle be x and y.

sin(60) = x /48
48*sin(60) = x
x = 41.6 cm

cos(60) = y /48
48*cos(60) = y
y = 24 cm

Perimter = 48 + x + y
Perimeter = 48 + 41.6 + 24
Perimter = 113.6 cm