2. Draw another triangle. Note that the base of the triangle is the same as the width of the rectangle.

3. Roof: The shape tool draws a rectangular box with no color and selects strokes. Delete a point of the rectangle with the right angle selection tool, and then rotate the rectangle by 45 degrees.

The shape of the roof is obtained, and the end of the stroke is round.

4. Align the three shapes in the middle and position them. The shape of the house will be good.

5. smiling mouth: the method in reference 3. The shape tool draws a circle with no fill color and selects a stroke. Use the direct selection tool to delete an anchor point at the top of the circle to get a semi-circular arc, and select a fillet for the stroke port. Adjust the stroke size and put it in the right position.