if you were to multiply 9 by 6 you would get 54, so yes its true.
6. angles are equal
7.True
8.True
9. Zero
6. Angles are equal and sides are proportional to similar figures
7. They can be the same size and they would be congruent but if they are proportional they would still fir the definition of similar polygons
8. all sides when multiplied by the scale factor change by that ratio.
9.A zero in a denominator is renders it undefined.
Use the law of sines...(sina/A=sinb/B=sinc/C for any triangle)
sin90/1000=sin20/RS
RS=1000sin20/sin90
RS≈342 meters