Geometry (Plane Mensuration 2D), Study notes of Geometry

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———x«xxX—Xx— - ~:~ PLANE (2°) MENS URA TION > decals w/ formuiet for area, length ana pecimeder of plane Figures, T- The jriangle A? Area (@) Basic Formula where, b> base or ho height er atitncey hb h b t wf ne esertbed — Kinalong a= /zbh civrcomscribed — myakaP surmounted iptnateng © Given 2cidec ava inseriged — ipiracok ang\e Ahem =’ Aa? Ypabore oY i S Civen 3sides @ Equilatera) A * Hero's Formula , perans a e Formula) a oe oF B GO 72. & a a) Aas /2 areiplo* Ap s(s-a}(s-+)(e-c) at S =: Vz (arte) Ag = Ts 42 Axk4ic = P, perimeter 4 ® a arcumsenbed 7 % circle © circle wnscribed ~= a a