Question

Urgent!
Calaculeaza aria anui triunghi dreptunghic a carui ipotenuza este de 13 cm. si o cateta de 5 cm!

Answer 1

■Vom aplica Teorema lui Pitagora pentru a afla a doua cateta:

ip²=c1²+c2² => c2²=ip²-c1²

c2²=13²-5²

c2²=169-25

c2²=144 => c2=radical din 144=12 cm

■Acum vom afla aria:

A=c1×c2/2

A=5×12/2

A=60/2

A=30 cm²

Answer 2

$\it (5, 12, 13) -triplet\ pitagoreic \Rightarrow c_1=5,\ c_2=12\\ \\ \\ \mathcal{A}=\dfrac{c_1\cdot c_2}{2}=\dfrac{5\cdot12}{2}=\dfrac{60}{2}=30\ cm^2$