First draw a line of BC=8.5 cm then draw angle b as 60 and and angle c as 45 degree then draw the angle bisectors of respective angles and then join the lines and u will get the triangle forming there name it as triangle abc
this is the correct answer that I am telling to you

1-) draw a line xy of 8.5cm
2-) draw a 60degree angle with taking x as centre
3-) draw a 45degree angle with taking y as centre
4-) draw the bisector of angle x and y
5-) produce both angle to meet at point A
6-) draw the perpendicular bisector of line xa cutting xy at b
7-) draw the perpendicular biector of ya meeting xy at c
8-)join ab and ac

then ABC will be your required triangle

hope it will help you a lot

pls mark it as brainlist answer