Tolong Bantu Y! soalnya besok harus di kumpulkan

a).AC²=AB²+BC²
AC²=12²+9²
AC²=144+81
AC=√225
AC=15 cm,

AD²=DC²–AC²
AD²=25²–15²
AD²=625–225
AD=√400
AD=20 cm

b).LΔABC : LΔACD
(1/2)(a)(t) : (1/2)(a)(t)
(1/2)(12)(9) : (1/2)(20)(15)
(6)(9) : (10)(15)
54 : 150
9 : 25

a) ACpangkat 2=9x9 + 12x12 = akar 225=15 cm
ADpangkat 2 =25x25 +15 x15
AD=akar400
=20cm
B) Labc:Lacd
1/2x12x9=1/2x20x15
108 :300
=36:100
=18:50
=9:25