Question

find the value of x.
(there is a quadrilateral with angles 125°, 75°, 72° and x°; and a box with x = )

Explanation:

Step1: Recall quadrilateral angle sum

The sum of interior angles of a quadrilateral is $360^\circ$.

Step2: Sum known angles

Calculate total of given angles:
$125^\circ + 75^\circ + 72^\circ = 272^\circ$

Step3: Solve for $x$

Subtract sum from $360^\circ$:
$x = 360^\circ - 272^\circ$

Answer:

$88^\circ$