Trapesium ialah bangun datar segiempat dengan satu pasang sisi berhadapan yang sejajar.

Sifat-Sifat: Sudut tiap pasang yang sisinya sejajar yaitu 180⁰.

Jenis-jenis trapesium:

• Trapesium Siku-SIku memiliki sudut siku-siku.
• Trapesium Sembarang memiliki sisi-sisi yang berbeda
• Trapesium Sama Kaki memiliki sepasang kaki sama panjang

Penjelasan dengan langkah-langkah:

Here is a diagram of the trapezoid:

          A-----------------B

          |\               /|

          | \             / |

        h |  \           /  |

          |   \         /   |

          |    \       /    |

          |     \     /     |

          |      \   /      |

          |       \ /       |

          D-----E-------C

                  b

a. To find the height of the trapezoid, we can use trigonometry. Since ZDAB is a right angle and ZDA and ZAB are both 45 degrees, we know that DAB is also a right angle. Therefore, we can use the tangent function to find the height h:

• tan(45) = h/b

Solving for h, we get:

• h = b * tan(45)

Since AD = BC, we know that b = AD + DC = 3 + 11 = 14 cm. Therefore:

• h = 14 * tan(45) ≈ 14

So the height of the trapezoid is approximately 14 cm.

b. To find the area of the trapezoid, we can use the formula:

• Area = (base1 + base2) * height / 2

where base1 and base2 are the lengths of AB and CD, respectively. We already know that AB = 11 cm and CD = 3 cm, and we just found that the height h is approximately 14 cm. Therefore:

• Area = (11 + 3) * 14 / 2 = 98

So the area of the trapezoid is 98 square cm.

Pelajari Lebih lanjut

Pelajari lebih lanjut materi tentang sebutkan unsur-unsur dari persegi panjang, trapesium, belah ketupat yomemimo.com/tugas/27505783

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