Answer:A quadrilateral house design means the house is shaped like a four-sided figure. This can be a square, rectangle, or any shape with four sides. It's a common design because it’s simple, stable, and easy to build. The straight edges make it easier to divide the space into rooms, and the structure is strong and efficient for everyday use.Step-by-step explanation:Step 1: Understand What a Quadrilateral IsA quadrilateral is a shape with four sides and four angles. Examples: square, rectangle, trapezoid, or irregular four-sided shapes.Step 2: Choose a Type of Quadrilateral for the HouseMost houses use:Rectangle – most common, perfect for rooms and hallways.Square – balanced design, often for smaller homes or rooms.Irregular quadrilateral – for modern or creative house shapes.Step 3: Plan the Layout Inside the ShapeBecause it has four sides:It’s easy to divide into rooms (bedrooms, kitchen, living room).Walls are straight, making it easy to build and furnish.Step 4: Build the Structure Based on the ShapeThe walls form the outline of the quadrilateral.The roof usually matches the shape, especially in rectangular homes.Doors and windows are added within the four-sided walls.Step 5: Use the Design for Function and BeautyQuadrilateral designs are practical and cost-effective.They allow for stable foundations and efficient use of space.The design is flexible, so it can fit both traditional and modern styles.