Angles in set squares

Image origin

---

---

Useful knowledge

Note that angles in triangles sum 180º:

Isosceles square 90º+45º+45º=180º

Scalene square 90º+30º+60=180º

---

---

Think and exercise

How would you draw these angles with set squares? 15º, 70º, 75º, 120º, 165º