Given:

Diameter of the semicircular protractor = 14 cm

Radius of the protractor = cm = 7 cm

∵ Perimeter of semicircle = πr + d

∴ Perimeter of semicircular protractor = × 7 + 14 = 22 + 14

= 36 cm

Hence, the perimeter of the semicircular protractor is 36 cm.