**The altitude (height) of an equilated triangle is 12 cm. Then whatis the perimeter ?**

height = 12

side = ( 2 / sqrt(3) ) * 12

side = 13.8564

perimeter = 3 * 13.8564

perimeter = 41.5692

where,

a = side

p = perimeter

A = area

h = height

m = median

t = angle bisector

R = circumscribed circle radius

r = inscribed circle radius

s = semi perimeter