Question

problem 6 determine the average of a, b, c, d, and e.

Explanation:

Step1: Sum of triangle angles

$a + b + c = 180^\circ$

Step2: Sum of supplementary angles

$d + e = 180^\circ$

Step3: Total sum of all angles

$(a + b + c) + (d + e) = 180^\circ + 180^\circ = 360^\circ$

Step4: Calculate the average

$\text{Average} = \frac{a + b + c + d + e}{5} = \frac{360^\circ}{5}$

Answer:

$72^\circ$