bantu jawab yah plis

A). L= at x ½24= a x 6 x ½24/3= aa = 8 cmb).L= at x ½21 = a x 7 x ½3= a x ½6 cm = ac).L= at x ½30= a x 12 x ½30/6 = aa= 5 cmmaaf klo sala