What Are Essential Tips for Hiking in the Woods?

[Albert1]

View attachment 2738

 

[Opalg]

[sp]From the formula $\frac12bc\sin A$ for the area of a triangle, each of the coloured regions $R,S,T$ has the same area as the triangle $ABC$. This is maximised when $AB$ is perpendicular to $AC$. The area of each region is then $10$ and their combined area is $30.$[/sp]

 

[Albert1]

[sp]From the formula $\frac12bc\sin A$ for the area of a triangle, each of the coloured regions $R,S,T$ has the same area as the triangle $ABC$. This is maximised when $AB$ is perpendicular to $AC$. The area of each region is then $10$ and their combined area is $30.$[/sp]

fine ,you got it !