Page 39: 1. 1. The same 2. Zoom in, unchanged 3. Zoom out, shape 2,1.x2.x3. √4.× 3, 4, 5. Draw 6,3.14× 5 by yourself? =3. 14×25=78.2(cm？ ) (horizon) 706.5÷78.5=9 A: The photo should be enlarged 3 times.

Page 40: 1. 1. Enlarged shape of the same equilateral triangle with side length 2. Rectangular 4cm 1cm 10cm4cm? 2. Enlarge each side of the left picture twice to get the right picture, and reduce the right picture by half to get the left picture. A: Square B and Square C are enlarged views of Square A, and Square A is a reduced view of Square C. ..