Question

Alex surveyed 60 student about their Vera zoo animals and made the circle graph of the results shown below

Answer 1

we can use the cross multiplication

we know that the full angle of a circle is 360° so the total angle corresponds to 60 students

so, what is 72 degrees?

$\begin{gathered} 360\longrightarrow60 \\ 72\longrightarrow x \end{gathered}$

where x is the number of students than said giraffes

$\begin{gathered} x=\frac{72\times60}{360} \\ \\ x=12 \end{gathered}$

the students than said giraffes are 12