Question

In triunghiul ABC dreptunghic , m ( a) l-am rezolvat , nu e nevoie
b) Daca AB = 20cm , BC=25 cm , AD =12 cm , calculati aria ABC si AC
c) Daca AD=28,8 cm , AB=36 cm , aria ABC = 864 cm2 , calculati AC , BC
d) Daca AB =2,4 m , BC=30 dm , AC = 18 dm , calculati AD .
Vreau seriozitate , sunt multe puncte . Dau raport daca nu sunteti seriosi

Answer 1

b)AC^2 =25^2-20^2 =625-400 =225
AC =15cm
A =25*12 =300cm^2
c)A = C1*C2/2
864 =36*C 2/ 2
C2 =864*2/36 =48 cm
BC^2 =36^2+48^2 =1296+2304 =3600
BC =60 cm
d)2.4M =24 dm
h =24*18/30 =14.4 dm