Question

Triunghiurile ABC si A1B1C1 sint asemenea si AB=12C, A1B1=3cm , AC=16cm , B1C1 =2cm .Sa se afle perimetrele triunghiurilor ABC si A1B1C1

Answer 1

Doua triunghiuri sunt asemenea daca au toate laturile proportionale. ( ma refer strict la problema asta)
AB\A1B1=AC\A1C1=BC\B1C1
Luam pe rand
AB\A1B1=AC\A1C1
12\3=16\A1C1   => A1C1=16x3\12=4cm
AB\A1B1=BC\B1C!
12\3=BC\2    =>BC=12x2\3=8cm
Perimetrul ABC=12+8+16=36
Perimetrul A1B1C1=3+4+2=9