An area in central north carolina is known as the research triangle because of the relatively large number of high-tech companies and research universities located there. duke university, the university of north carolina at chapel hill, and north carolina state university are all within this area. the research triangle is roughly bounded by the cities of chapel hill, durham, and raleigh. from chapel hill, the angle between durham and raleigh measures 54.8°. from raleigh, the angle between chapel hill and durham measures 24.1°. find the angle between chapel hill and raleigh from durham