Question

what is the value of x in this triangle?
45°
80° x°
enter your answer in the box.
x = \square

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is $180^\circ$.

Step2: Set up the equation

$45^\circ + 80^\circ + x^\circ = 180^\circ$

Step3: Calculate known angle sum

$45 + 80 = 125$

Step4: Solve for $x$

$x = 180 - 125$

Answer:

$55$