Question

in triunghiul MNP construim inaltimea MD,d apartine NP.daca MD=5 cm inaltimea MNP=20 cm patrat,aflati NP

Answer 1

$\ \ Folosim formula \triangle_{MNP} = \frac{b\cdot h}{2} \\ \\ b \rightarrow este baza, adica NP \\ h \rightarrow este inaltimea, adica MD \\ \\ \triangle_{MNP} = 20 cm^2 \\ h = 5 cm \\ \\ \Rightarrow 20= \frac{NP\cdot5}{2} \Rightarrow NP \cdot 5 = 40 \Rightarrow NP = \frac{40}{5}\Rightarrow NP = 8 cm$