ht tp://prnt scr.c om/bhe 6km

Delete all the spaces in the link
The link is the diagram needed to solve this question

Please Help,
Thanks

1 answer

1 + 2 + 3 is a straight angle (180º)

3 is a right angle (90º)

1 + 2 = 90 = x + x - 6 = 2 x - 6