In triangle PQR shown below, what is the measure of angle R in degrees

angle R = 23.5°

Step-by-step explanation:

we should know the total interior angle of a triangle is 180°

angle R + 47.5° + 109° = 180°

angle R = 180° - 47.5° - 109°

angle R = 23.5°

2

Step-by-step explanation:

14, 16, 19, 19, 20, 20, 21, 21, 22, 22

Median: 20

Lower quartile: 19

Upper quartile: 21

Interquartile range: 21 - 19 = 2