Question

deltamath unit 4 review due: september 17 at 11:59 pm grade: 36% properties of isosceles triangles solve for interior angles - triangle (level 2) calculator markeviar heath log out

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°.
So, \((2x + 11)+108 + 47=180\).

Step2: Simplify the left - hand side

Combine like terms: \(2x+11 + 108+47=2x + 166\). So, \(2x+166 = 180\).

Step3: Solve for \(x\)

Subtract 166 from both sides: \(2x=180 - 166\), \(2x = 14\). Then divide both sides by 2: \(x = 7\).

Answer:

\(x = 7\)