tolong dong sob bantu saya mengerjakan nya ??

panjang RS = 9 cm
panjang PQ = 20 cm
panjang SQ = 16 cm
panjang RQ = RS + SQ = 9 + 16 = 25
dicari panjang PR
misal RQ = a, PQ = b, PR = c
pakai rumus phytagoras
[tex] {a}^{2} = {c}^{2} + {b}^{2} [/tex]

25 x 25= (c x c) + 20 x 20
625 = (c x c) + 400
c x c = 625 - 400
c x c = 225
c = akar dua dari 225
c = 15
jadi panjang PR = c, PR = 15