Iklan

Iklan

Pertanyaan

Keliling segi-12 beraturan yang jari-jari lingkaran luarnya r cm adalah.....

Keliling segi-12 beraturan yang jari-jari lingkaran luarnya r cm adalah.....

  1. 2 r square root of 2 minus square root of 3 space end root space c m

  2. 6 r square root of 2 minus square root of 3 end root space c m

  3. 12 r square root of 2 minus square root of 3 end root space c m

  4. 6 r square root of 2 plus square root of 3 end root space c m

  5. 12 r square root of 2 plus square root of 3 end root space c m

Iklan

A. Acfreelance

Master Teacher

Jawaban terverifikasi

Iklan

Pembahasan

M a k a space b e s a r space s u d u t space alpha equals 360 to the power of o over 12 equals 30 to the power of o  S e h i n g g a  cos alpha equals fraction numerator O E squared plus O F squared minus E F squared over denominator 2 cross times O E cross times O F end fraction  cos 30 to the power of o equals fraction numerator r squared plus r squared minus E F squared over denominator 2 cross times r cross times r end fraction  1 half square root of 3 equals fraction numerator r squared plus r squared minus E F squared over denominator 2 cross times r cross times r end fraction  1 half square root of 3 equals fraction numerator 2 r squared minus E F squared over denominator 2 r squared end fraction  square root of 3 r squared equals 2 r squared minus E F squared  E F squared equals 2 r squared minus square root of 3 r squared  E F squared equals r squared open parentheses 2 minus square root of 3 close parentheses  E F equals square root of r squared open parentheses 2 minus square root of 3 close parentheses end root  E F equals r square root of 2 minus square root of 3 end root  e h i n g g a space k e l i l i n g space s e g i space 12 space a d a l a h space 12 space E F space equals space 12 r square root of 2 minus square root of 3 end root

Perdalam pemahamanmu bersama Master Teacher
di sesi Live Teaching, GRATIS!

18

Iklan

Iklan

Pertanyaan serupa

Sebuah ∆ADC dengan ∠ D A C = 6 0 ∘ dan panjang AC = 16 cm . Panjang AD adalah...

4

4.4

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Roboguru

Coba GRATIS Aplikasi Ruangguru

Download di Google PlayDownload di AppstoreDownload di App Gallery

Produk Ruangguru

Hubungi Kami

Ruangguru WhatsApp

+62 815-7441-0000

Email info@ruangguru.com

info@ruangguru.com

Contact 02140008000

02140008000

Ikuti Kami

©2024 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia