1. Draw a square with a side length of 2 cm, then make the largest circle in it, and mark the diameter, radius and center of the circle.

2. Draw a rectangle with a length of 6 cm and a width of 3 cm, and then draw a semicircle with the length as the diameter in the rectangle to find out the circumference and area of the semicircle.

3. Draw an isosceles trapezoid with a base of 4 cm, a height of 2 cm and a base angle of 80.

4. Draw a right trapezoid with a base of 5cm, a height of 1cm and an area of 4cm2.

5. Draw a regular triangle with a side length of 3 cm and make all symmetry axes.

6. Draw an isosceles triangle with a base length of 3 cm and a base angle of 50.