Answer:18 cm²Step-by-step explanation:The given triangle is a right angled triangle. By tilting the triangle & placing the 90° to the base side, we can see that,Base (b) = 6 cmHeight (h) = 66cm=》Area of the triangle = ½bh= ½ × 6 × 6= ½ × 36= 18 cm²■ Refer to the image.Hope it helps ⚜