For right triangles we can use trigonmoetrical ratios if we want calculate the oppisite side of an angle
on this case we use sine to calculate m
[tex]\sin (\alpha)=\frac{O}{H}[/tex]
where alpha is the angle, O the opposite side of the angle and H the hypotenuse of the triangle
on this triangle
alpha is 45°
the front side is m
and the hypoteuse 7
so replacing
[tex]\sin (45)=\frac{m}{7}[/tex]
on this point we can solve m form the equation and calulate
[tex]\begin{gathered} m=7\sin (45) \\ m=\frac{7\sqrt[]{2}}{2} \\ \\ m\approx4.95 \end{gathered}[/tex]
