Answer:
Answer: 50 degrees
Step-by-step explanation:
important things to know:
- the square in the bottom right means 90°
- all angles in a triangle add up to 180°
using this knowledge, you can make the following equation:
90 + 40 + x = 180
130 + x = 180
now subtract 130 from both sides.
x = 180 - 130
x = 50°
