Question

Sa se calculeze aria triunghiului dreptunghic ABC,m(A)=90grade,stiind ca AB=4 si BC=5

Answer 1

A=1/2*AB*AC
AC²=BC²-AB²=25-16=9
AC=3
A=1/2*4*3=6cm²

Answer 2

Teorema Pitagora $CA^{2} =AB^{2} +BC^{2}$
CA2=$CA^{2} =AB^{2} +BC^{2} CA^{2} =4^{2} +5^{2} CA^{2} =16+25 CA^{2} =36 CA= \sqrt{36}$
CA=6

P=4+5+6
P=14