tolong pake jalan.. kumpul bsok

AB= t =√(AC² - BC) = √(29² - 21²) = √(841 - 441) = √400 = 20cm

LΔABC = 1/2.a.t = 1/2.21.20 = 210cm²

Ab^2=ac^2-bc^2
=29^2 - 21^2
=841 - 441
AB^2 = 400
AB= √400
AB=20 cm

Luas abc = 1/2 .a. t =1/2 . 21 .20 =1/2 . 420 =210cm