Question

In triunghiul dreptunghic ABC , m (A)=90° , m (C)= 15° , ipotenuza BC =12 cm. Construiti mediana AM M apartine BC since calculati aria triunghiului dreptunghic

Answer 1

B
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A______________C

t. <15° => AB=BC/4 =>AB=3 cm
AC^2 = BC^2 - AB^2 (t.Pit.)
AC^2 = 12^2 - 3^2
AC^2 = (12-3)(12+3)
AC^2 = 9•15 =>AC=3rad15
Aria=(3•3rad15)/2=9rad15/2 cm^2