1. 2r=d 2. 3.14d=c 3. math and socail studies are close together in old history 4. there is 360degreese in a circle because of 360 days(ancient calenders) 5. if you where a free man over 16 you had to have certain items 6. 1 shilling=12 pennies 7. a baker would guess how hot it had to be to cook 8. one ell=45inches 9. being a joiner you would join two objects together 10. survyers would mesure land 10. common tools blacksmith would use are measurment tools rulers scales etc