How would you measure the perimeter of the outside of an object? 
With a scale. With a ruler. With a thermometer. With a hydrometer. by indirect light Under 32 degrees focusing a lens electron microscope
A B C D E F G H
Perimeter is the total length around the object.
A ruler is used for measuring the perimeter of an object.
How would you measure the perimeter of the outside of an object?  (A) With a scale. (B) With a ruler. (C) With a thermometer. (D) With a hydrometer. (E) by indirect light (F) Under 32 degrees (G) focusing a lens (H) electron microscope