Complete the proof of the exterior angle theorem
given: ∠adc is an exterior angle of ∆bcd.
prove: m∠b+m∠c=m∠adc

1. ∠adc is an exterior angle of δbcd= given
2. = triangle sum of theorem
3. ∠adc and ∠bdc form a linear pair=
4. =
5. =
6. =
7. ∠adc=m∠b+m∠c = subtraction property of equality

City l has a temperature of −3 °f. city m has a temperature of −7 °f. use the number line shown to answer the questions: number line from negative 8 to positive 8 in increments of 1 is shown. part a: write an inequality to compare the temperatures of the two cities. (3 points) part b: explain what the inequality means in relation to the positions of these numbers on the number line. (4 points) part c: use the number line to explain which city is warmer. (3 points)