Both property 4 and 5 can be proved geometrically using similar triangles
nsp
I see this for 4. How will you show 5 with similar triangles?
yidiz
Oh Sorry! I made a mistake there, where I thought u and v are pointing in the same direction. The right way would be calculating the area of parallelograms I think
nsp
One thing you might try is breaking u and v into components along w and perpendicular to w, making an argument for these components separately, and then putting them all back together.
Both property 4 and 5 can be proved geometrically using similar triangles
I see this for 4. How will you show 5 with similar triangles?
Oh Sorry! I made a mistake there, where I thought u and v are pointing in the same direction. The right way would be calculating the area of parallelograms I think
One thing you might try is breaking u and v into components along w and perpendicular to w, making an argument for these components separately, and then putting them all back together.