Question

In triunghiul oarecare ABC se duc AM perpendicular pe BC si BN perpendicular pe AC :a) Daca AC=15 cm ,BN=12 cm ,BC=20 cm , calculati AM si Aria triunghiului ABCb)Daca AM=6 cm ,AC=18 cm , Aria triunghiului ABC =72 cm , calculati BC si BN

Answer 1

Aria=15x12/2=90 cm²
Aria= AMx20/2=90 cm²
AM=90x2/20 = 9 cm

b)AM=6
AC=18
Aria=72 cm²²
Aria=BCxAM/2=BCx6/2=72 cm²
BC=72x2/6=24 cm
Aria=ACxBN/2=18xBN/2=72 cm²
BN=72x2/18 = 8 cm