Question

which of the following equations could be used to find the missing angle measure? 44 + 51 + 90 = x 44 + 51 + x = 90 44 + 51 + x = 180 44 + x = 180 + 51

Explanation:

Step1: Recall the triangle angle - sum property

The sum of the interior angles of a triangle is \(180^{\circ}\).

Step2: Set up the equation

If the angles of the triangle are \(44^{\circ}\), \(51^{\circ}\), and \(x^{\circ}\), then by the triangle angle - sum property, \(44 + 51+x=180\).

Answer:

\(44 + 51+x=180\) (the third option)