A scientist records the water temperature and the air temperature in Antarctica. The water is -2c. The air is 9c colder than the water. What is the tempature of the air?

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.