The three angles of a convex quadrilateral are 90 °, 80 °, and 70 °. Find the size of the fourth corner.
| November 22, 2020 | education
Since the quadrilateral is convex, the sum of its four angles is 360 °.
360 ° -90 ° -80 ° -70 ° = 120 ° equals the fourth angle.
Answer: 360 °
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
