Question

URGENT VA ROG!!
Calculati raza cercului circumscris triunghiului ABC daca AB=AC=20cm si BC=24cm!!

Answer 1

$R= \frac{abc}{4A} = \frac{20*20*24}{4A} \\ A= \frac{1}{2}a h_{a}= \frac{1}{2}*24* h_{a}=12 h_{a} \\ h_{a}= \sqrt{20^2-12^2} = \sqrt{256}=16 cm \\ A=12*16=192cm^2 \\ R= \frac{20*20*24}{4*192}= 12,5 cm$