In triangle ABC if O is the circum centre and H is the orthocentre then show that OA+OB+OC=OH, HA+HB+HC=OH???
If 9th term of an AP is zero, prove that its 29th term is double the 19th term
in the right angle triangle XYZ right angle triangle at Z M is mid point of XYZ is joining to M and produced at point p.such that pm is equal xm point p is joined to y show angle pyz is equal to 90