401: The Extraordinary Story of the Man who Ran 401 Marathons in 401 Days and Changed His Life Fore

401: The Extraordinary Story of the Man who Ran 401 Marathons in 401 Days and Changed His Life Fore

Matematika a.30
b.45
c.55
d.95

tolong bantu ya​

a.30
b.45
c.55
d.95

tolong bantu ya​

Jawaban:

[tex] \angle \rm BOC = 95°[/tex]

Penjelasan dengan langkah-langkah:

mencari nilai [tex] \rm x[/tex]

[tex]\begin{aligned} \footnotesize\rm (x - 15) +( 2x + 5) + (2x - 35)&= \footnotesize180 \degree \\\footnotesize\rm x + 2x + 2x - 15 + 5 - 35 & = \footnotesize180 \\\footnotesize\rm5x - 45 & = \footnotesize180 \\\footnotesize\rm5x& = \footnotesize180 + 45 \\\footnotesize\rm x& =\footnotesize \frac{225}{5} \\\footnotesize\rm x& =\footnotesize 45 \end{aligned}[/tex]

mencari besar [tex] \angle \rm BOC[/tex]

[tex] \begin{aligned} \footnotesize\angle \rm BOC&= \footnotesize \rm 2x + 5\\ & = \footnotesize \rm 2(45) + 5 \\ & = \footnotesize 90 + 5 \\ & = \footnotesize \bold{95°} \end{aligned}[/tex]