Tentukan besar sudut CBD​

47,5°

Penjelasan dengan langkah-langkah:

(2y + 23) + (6y – 11) = 90

8y + 12 = 90

8y = 90 – 12

= 78

y = 78/8

= 9,75

<CBD = 6y° – 11°

= 6 x 9,75° – 11

= 58,5° – 11°

= 47,5°