private void button3_Click(object sender, EventArgs e)
{
double ind_scale = Double.Parse(textBox5.Text);
pol.scale(ind_scale);
Clear();
print();
}
private void button7_Click(object sender, EventArgs e)
{
ClearWithout();
write_axes();
double ind_scale = Double.Parse(textBox9.Text.ToString());
figure.scale(ind_scale);
print_figure();
}