Question

in exercises 11 and 12, find the value of the variable. then find the angle measures of the polygon. use a protractor to check the reasonableness of your answer. 11. sum of angle measures: 180° triangle with angles n°, 4n°, 40° 12. sum of angle measures: 360° quadrilateral with angles 7a°, 10a°, 7a°, 12a°

Explanation:

Answer:

1. \( n = 28 \), angle measures: \( 28^\circ \), \( 112^\circ \), \( 40^\circ \)
2. \( a = 12 \), angle measures: \( 84^\circ \), \( 120^\circ \), \( 84^\circ \), \( 144^\circ \)