MEASURING STANDARD AND METRIC CUBIT Cubit: In ancient Egypt, a cubit was the distance from the elbow to the fingertips. Today a cubit is about 18 inches. WHOSE CUBIT DO WE USE CONSIDER THE FOOT Foot: In ancient times, the foot was 11 1 /42 inches. Today it is 12 inches, the length of the average man's foot. This is where the Ruler got its name. 5 Where did the inch come from? Inch: At first an inch was the width of a man's thumb. In the 14th century, King Edward II of England ruled that 1 inch equalled 3 grains of barley placed end to end lengthwise. The first to standardize were the Romans 1 mile is 1000 double steps by marching roman troops The yard, foot and inch King Edward 1 YARD 3 FEET 36 INCHES ACRE 1 ACRE FURLONG 1 FURLONG IS THE LENGTH OF A FURROW PLOWED ACROSS A 10 ACRE FIELD WHICH IS 220 YARDS 24 FURLONGS 5280 FEET LETS REVIEW The English System 1 yard 3 feet 36 inches 1 furlong= 220 yards 1 mile King Edward 5280 feet 24 furlongs METRIC SYSTEM CREATED BY FRENCH SCIENTISTS IN THE 1790 METER THE METER IS 1,670, WAVE LENGTHS OF A SPECTRAL YELLOW LIGHT EMITTED BY KRYPTON GAS. 1 METER METER CENTIMETER MILLIMETER There would be 10 millimeter lines between each of the small centimeter lines 14 KILOMETER 15 HECTOMETER 16 DECAMETER MILLIMETER 1000 th CENTIMETER 100 th DECIMETER 10 th METER 1 DECAMETER 10 HECTOMETER 100 KILOMETER 1000 17 WHICH ONE IS EASIER? MILLIMETER 1000 th CENTIMETER 100 th DECIMETER 10 th METER 1 DECAMETER 10 HECTOMETER 100 KILOMETER 1000 How many millimeters in a kilometer? INCH 1 FEET 12 YARD 3 MILE 1760 How many inches in a mile? WHY DO WE NEED TO KNOW THE METRIC SYSTEM?