Răspuns:
a) AC = AB (ABC isoscel)
P = AB+AC+BC=10+10+12=32 cm
AD = radical AB^2-BD^2=radical 100-36=8
Aria= AD*BC/2=8*12/2=48
b)sin B = AD/AB=8/10=4/5
cos B = BD/AB = 6/10=3/5
sin B + cos B = 4/5+3/5=7/5
c) BE*AC/2=AD*BC/2 rezulta BE = AD*BC/AC=8*12/10=48/5
Explicație pas cu pas:
