Question

What is the sum of the measures of 1, 2, 3 and 4?

Answer 1

360°

Explanation:

1+3=180°

2+4=180°

so, ( 1+3)+(2+4)=360°

or:

1+2=180°

3+4=180°

so, so,( 1+2)+(3+4)=360°