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segitiga dan jajar genjang

Segitiga dan Jajar genjang

paulinkrisna
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segitiga dan jajar genjang

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  1. SEGITIGA danJAJAR GENJANG Oleh: PaulinKrisnaWidiastuti

  2. KelilingSegitiga • kelilingadalahukuranpanjangsisi yang mengitaribangundatar • Kelilingsegitiga ABC adalahjumlahpanjangsisi-sisinya. Dituliskansebagaiberikut. • K = AB + AC + BC

  3. LuasSegitiga • Dalamsegitiga, tidakadaukuranpanjangdanlebar. Sisibawah • disebut alas (a) dansisitegakdisebuttinggi (t). Sehinggaluas • segitigadirumuskan: L =1/2 × alas (a) × tinggi (t)

  4. KelilingJajarGenjang • Kelilingjajargenjang ABCD adalahjumlahpanjangsisi-sisinya, yaitudirumuskansebagaiberikut. • K = AB + BC + CD + AD • KarenaAB = CD dan BC = AD, makarumuskelilingjajargenjangABCD dapatdituliskansebagaiberikut. • K = 2 × (AB + BC)

  5. LuasJajarGenjang • Luasjajargenjangsamadenganluaspersegipanjang. • Dalambangundatarjajargenjangukuranpanjangmenjadi alas (a) danukuranlebarmenjaditinggi (t). • Sehinggaluasjajargenjangdirumuskansebagaiberikut. • L = alas (a) × tinggi (t)

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