Question

va rog urgent dau coroana!!​

Answer 1

P ∆ABC = Ab+BC + CA = 25+25+40=90 => p= 45

A= √ p(p-a)(p-b)(p-c)

A= √ 45(45-25)(45-25)(45-40)

A=√ 45 × 20×20×5

A= √3² × 20² × 5²

A= 3×20×5= 300 cm²

A= h1×BC= 300

300=h1×40 =>h1= 300/40=30/4=15/2=7,5 cm

A= h2×25=300

h2=300/25 = 12 cm

∆ABC isoscel => h2= h3=12 cm

h1+h2+h3=7,5+2×12 = 7,5 + 24= 31,5 cm

CU PLACRE!!

COROANA?