Question

sides:
angles:
equation:
x =

Explanation:

Step1: Recall angle - sum property

The sum of interior angles of a triangle is 180°.

Step2: Set up the equation

Let the three angles of the triangle be 45°, 70°, and \(x\). The equation is \(45 + 70+x=180\).

Step3: Simplify the left - hand side

\(45 + 70=115\), so the equation becomes \(115 + x=180\).

Step4: Solve for \(x\)

Subtract 115 from both sides: \(x=180 - 115\).
\(x = 65\)

Answer:

65