jawab nomor c sampai e

No.c = Luas Segitiga = ½×a×t
= ½×12×9
= ½×108 = 54 cm

No.d = Luas Segitiga = ½ × a × t
=½ ×6×6
=½×36 =18 cm

No.e = Luas Segitiga =½×a×t
=½×8×8
=½×64 = 32 cm