Two right angles is 90+90=180°. the inside angles of a polygon always add up to 360°, so the other four angles add to 360°-180°=180°. 180/4 is 45. since all of the "x" angles are the same, x=45°
1)44
3)44
4)136
i want to say that the other side 5-8 are the same as 1-4 but im not totally sure
Just multiply x times x and y times y
The measure of the third angle is 105*
All angles of a triangle equal to 180* so you add 55+20=75
Then you subtract 180-75=105
And 105* is your missing angle