1 inch
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Blackboards are different sizes. You need to measure the particular blackboard with a ruler or tape measure to get the width. The width is the shorter side (the length is the longer side).
No, a ruler is used only to measure length, width or height. You must use a protractor in order to measure the degrees in an angle.
Honey, measuring the width of a triangle is as easy as measuring the distance between two of its sides. Just whip out your ruler or measuring tape, line it up perpendicular to the base, and boom, you've got your width. No need for fancy math or geometry tricks here, just good old-fashioned measuring.
The typical ruler is NOT 1inch wide It is wider. More like 1 and 2/16 ths. Why can’t they just be one inch. It would make like so much easier.
A ruler or tape measure would be the best tool. You cannot measure the volume directly. First, measure the length, width and height with the ruler and use the formula of volume of cubiod (L x W x H)