How to make 3D Christmas trees
Take the sheet of a green paper 15*21 cm, bend it crosswise. Turn the bent side toward you and measure 8 cm. Connect this mark with the opposite corner to receive a right triangle. Measure from the top of the sheet 15 cm and mark it on the hypotenuse of the triangle. Connect this mark with the right angle of the triangle.
From this line draw a line parallel to the hypotenuse at a distance of 1 cm from it inside the triangle. Make marks on this line and on the bent side of the paper at a distance of 0.5 cm from each other. Connect these marks with marks on the inner hypotenuse with parallel lines. Draw another hypotenuse between the two available in the middle. Make marks on the external hypotenuse at a distance of 1 cm from each other. Connect these marks with parallel lines to the inner hypotenuse. Now divide each of the resulting rectangles into two triangles. You will receive a half of Christmas tree. Draw half of the star at its top. Cut out the Christmas tree. Cut the tree along parallel lines to the inner hypotenuse. Then erase the drawing from the paper carefully. Fold the jagged edges of the tree and divide the cut strips. Fold these strips through one in different directions. So you have a three-dimensional tree.
Decorate the Christmas tree with decorative stickers. Place an electric candle into it.