Question

Urgent dau coroana ​

Answer 1

Răspuns:

Explicație pas cu pas:

AD⊥BC

in ΔABD  dreptunghic

∡B=30°    AB=16 cm      BD=AB cos30°=16×√3/2=8√3 cm

BC=2BD=16√3

P=16+16+16√3=32+16√3 cm

AD=AB sin 30°=16/2=8cm

A=AD×BC/2=8×16√3/2=64√3 cm²

BE⊥AC    BE=BC sin 30°=16√3/2=8√3 cm inaltimea coresp lat congruente