what is ( mangle1 )?\n( mangle1=square^{circ} )

Explanation:

Step1: Apply the exterior angle theorem

The exterior angle theorem states that an exterior angle of a triangle is equal to the sum of the two non - adjacent interior angles.

Step2: Calculate (m\angle1)

Here, the two non - adjacent interior angles are (47^{\circ}) and (85^{\circ}). So, (m\angle1=47^{\circ}+85^{\circ}). [m\angle1 = 132^{\circ}]

Answer:

(132)