Question

Calculati aria si lungimea inaltimii BE a triunghiului ABC , daca AC = 18 cm, BC= 14 cm si masura unghiului C = 45 de grade. VA rooogggg.

Answer 1

AC+ BC=18+14=32
(AC+BC)- C= 45-32=13 Așa cred eu!!!!!

Answer 2

∡EBC=90-∡ECB=90-45=45 grade ⇒tr BEC e isoscel ⇒EB=EC

cu pitagora avem

14^2 = 2EB^2

EB = 7√2

aria tr.ABC  At

At = AC x BE/2 = (18 x 7√2)/2

At = 63√2