minta tolong yg bisa bantu

Jawaban:
PN=15 CM
Penjelasan dengan langkah-langkah:
[tex] {ap}^{2} = {mn}^{2} - (am - {pn}^{2} )[/tex]
[tex] {60}^{2} = {65}^{2} - ( {40}^{2} - {pn}^{2} )[/tex]
[tex]3.600 = 4.225 - (40 - {pn}^{2} )[/tex]
[tex](40 - {pn}^{2} ) = 4.225 - 3.600[/tex]
[tex](40 - {pn}^{2} ) = 625[/tex]
[tex](40 - pn) = \sqrt{625} = 25[/tex]
[tex]pn = 40 - 25 = 15 \: cm[/tex]