IKMC 2015 - Grades 7-8 - Self-study Question 12

Question 12

The centre of the top square is directly above the common edge of the two lower squares. Every square has side 1. What is the area of the shaded region?

Question illustration

$\frac 34$
$\frac 78$
$1$
$1\frac 14$
$1\frac 12$