tolong d bantu. mkshh bnykkk

25²-7²:625-49:576:24²
7×24:168 (d)

∆ ABC sama kaki
AD = BD = 7 cm ( alas)
BC = AC = 25cm ( sisi )
DC = tinggi = t =?
DC = BC - AD
= 25²- 7²
= 625 - 49
= √576
DC = 24 cm

Luas ∆ ABC = 1/2 × alas × tinggi
= 1/2 × (7 × 24)
= 84 cm²