помогите)геометрия 8 класс)

1) BH = √400-100 = 10√3

BH = √AH*HC

AH*HC = BH²

AH = BH² / HC = 300 / 10 = 30

AB = √BH²+AH² = √900+300 = 20√3

2) MC = BM² / AM = 144 / 16 = 9

BC = √81 + 144 = 15

AB = √625-225 = 20