When testing for current in a cable with ten color-coded wires, the author used a meter to test three wires at a time. How many different tests are required for every possible pairing of three wires?

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.