1)S = a²✓3/4 = 27✓3/4
p = 3a/2 = 9✓3/2
2)S = pr
r = S/p = 27√3•2/4•9✓3 = 3/2 = 1.5
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1)S = a²✓3/4 = 27✓3/4
p = 3a/2 = 9✓3/2
2)S = pr
r = S/p = 27√3•2/4•9✓3 = 3/2 = 1.5