Joke Collection Website - Talk about mood - Measure the degrees of the four corners in the picture and tell me what you find. ∠ 1 = _ _ _ _ _, ∠ 3 = _ _ _ _ _, ∠ 2 = _ _ _ _, ∠ 4 = _ _ _ _ _ _.

Measure the degrees of the four corners in the picture and tell me what you find. ∠ 1 = _ _ _ _ _, ∠ 3 = _ _ _ _ _, ∠ 2 = _ _ _ _, ∠ 4 = _ _ _ _ _ _.

(1) After measurement: ∠ 1 = 125, ∠ 3 = 55, ∠ 2 = 130, ∠ 4 = 50;

The sum of the four angles is125+55+130+50 = 360.

Through measurement and calculation, it is found that the sum of the four internal angles of the trapezoid is 360 degrees.

So the answer is:125,55,130,50; The sum of the four internal angles of a trapezoid is 360 degrees.