Consider circle o, where m bd=70 and m ca=170

BPD = 1/2(BD + CA)

BPD = 1/2(70 + 170)

BPD = 1/2(240)

BPD = 120

A full circle = 360 degrees

BC + AD = 360 - 70 - 170

BC+ AD = 360 - 240

BC + AD = 120

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.