What is x (in degrees)

Step-by-step explanation:

The reason why all the addition of the all the triangle's angles is equal to 180° is because it's a rule

REMEMBER THAT RULE

If you have any questions about the way I solved it, don't hesitate to ask me in the comments below =)

Lake, any relatively large body of slowly moving or standing water that occupies an inland basin of appreciable size. Definitions that precisely distinguish lakes, ponds, swamps, and even rivers and other bodies of nonoceanic water are not well established. It may be said, however, that rivers and streams are relatively fast moving; marshes and swamps contain relatively large quantities…

Step-by-step explanation:

Hope this helps feel free to brainliest?!?!?