Question

what is ( mangle gkj )?
( mangle gkj=square^{circ} )

Explanation:

Step1: Recall the total degrees in a circle

A full - circle has \(360^{\circ}\).

Step2: Set up the equation

Let \(m\angle GKJ=x\). We know that \(140^{\circ}+70^{\circ}+60^{\circ}+x = 360^{\circ}\).

Step3: Simplify the left - hand side

\(140 + 70+60+x=(140 + 70)+60+x=210+60+x = 270+x\).

Step4: Solve for \(x\)

Subtract \(270^{\circ}\) from both sides of the equation \(270+x = 360\). So \(x=360 - 270\).

Answer:

\(90\)