The figure shows three exterior angles of triangle abc. show that the measure of angle 1 plus the measure of angle 2 plus the measure of angle 3 equals 360

Step-by-step explanation:

Let the angle near point A be .

Let the angle near point B be .

Let the angle near point C be .

Let the external angle near point A be .

Let the external angle near point B be .

Let the external angle near point C be .

According to exterior angle property,exterior angle of an angle is the sum of other two angles.

So,

According to angle sum property,the sum of angles in the triangle add to

hi,

you half the rectangle that you ae asking about so then you would see the scale factor of 1/2 the one u have selected, the one on top is half.

hope this !