Answer:
40°
Explanation:
Every triangle adds up to 180°
So to get the angle of the triangle we already have two values of:
![180 - 79 - 52 = 50](https://img.qammunity.org/2020/formulas/mathematics/middle-school/j0df82hzjr6vry7gmxcpbpw99ue046f6ju.png)
Then since it's at a 90° angle we can subtract 50 to get:
40° as the other part of the right angle.
And applying the 180 rule again:
![180 - 100 - 40 = 40](https://img.qammunity.org/2020/formulas/mathematics/middle-school/9skhygc4tdnqb4srh6mmnr5u9iwabczbxc.png)