kak tolong pakai caranya ya

25 pangkat 2 = 20 pangkat 2 + x
x = 225= 15cm
25 pangkat 2 = 7 pangkat 2 + x
x = 576 = 24cm
kell abc = 25+7+24 = 56- kell adc 15+20+25=60
jd 60-56 = 4 (d)

AC^2 = AB^2 + BC^2
25^2 = 7^2 + BC^2
625 = 49 + BC^2
625- 49 = BC^2
576 = BC^2
[tex] \sqrt{576} [/tex]
BC = 24

AC^2 = AD^2 + DC^2
25^2 = 20^2 + DC^2
625 = 400 + DC^2
625 - 400 = DC^2
225 = DC^2
[tex] \sqrt{225} [/tex]
DC = 15

keliling ABC = AB + BC + AC
= 7 + 24 + 25
= 56
keliling ACD = AC + AD + CD
= 25 + 20 + 15
= 60

selisihnya = keliling ACD - keliling ABC
= 60 - 56
= 4 cm (D)