Question

Un triunghi dreptunghic cu un unghi cu masura de 30 are ipotenuza de 20 cm! Aflati perimetrul triunghiului..

Answer 1

sin 30 =cateta₁/ ipotenuza =cateta₁/20=1/2
cateta₁=20/2=10
cateta₂=√(20²-10²)=√(400-100)=√300=10√3
P=10√3+10+20=30+10√3=10(3+√3)

Answer 2

tr ABC , m(<A)=90 grade
=> t < 30 grade ,cateta opusa < 20/2=10 cm.
pitagora 20 patrat=10 patrat+c2 la patrat 
c2=10 radical 3
P= 30+10 radical 3