Question

find the value of the variable. (just type your numerical answer. no degree sign is needed.)
sum of angle measures: 360°

Explanation:

Step1: Set up equation

$a + 2a+2a + a=360$

Step2: Combine like - terms

$6a = 360$

Step3: Solve for $a$

$a=\frac{360}{6}=60$

Step4: Find value of $2a$

$2a = 2\times60 = 120$

Answer:

$a = 60$
$2a = 120$