Type the perimeter of a square of side 7 cm.
Type the perimeter of a rectangle whose longer side is 8 m and shorter side is 4 m in length.
Type the perimeter of a triangle whose sides are 6 m, 3 m and 5 m.
Type the perimeter of a plane-closed figure whose each of the six sides is 3 cm in length.
Type the area of a plane-closed figure that covers 15 squares in the square grid.
