Answer: To find the base, height, and area of the shaded triangle in the figure made up of 3 identical square sides measuring 12m, you can follow these steps:
1. Identify the shaded triangle within the figure.
2. The base of the triangle is one side of the square, which measures 12m.
3. To find the height of the triangle, you need to determine the perpendicular distance from the base to the top vertex of the triangle.
4. Since the triangle is identical to the square, the height will be the same as the side length of the square, which is also 12m.
5. The area of a triangle can be calculated using the formula: Area = (base * height) / 2.
6. Substitute the values: Area = (12m * 12m) / 2 = 144m² / 2 = 72m².
Therefore, the base of the shaded triangle is 12m, the height is 12m, and the area is 72m².