多角形の外角の和は必ず360度になるので、360-(60+83+99+55)=63でX角の外角が63度。
X角も同じく線を伸ばして考えると180-63で117になります!
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多角形の外角の和は必ず360度になるので、360-(60+83+99+55)=63でX角の外角が63度。
X角も同じく線を伸ばして考えると180-63で117になります!
Users viewing this question
are also looking at these questions 😉