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the+base+jk+of+an+isosceles+triangle+hjk+is+produced+to+l+if+j+%3D69+degree+calculate+hkl&es_nrs=true&pf=p&sclient=psy-ab&oq=the+base+jk+of+an+isosceles+triangle+hjk+is+produced+to+l+if+j+%3D69+degree+calculate+hkl
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PsyDAG
It would help if you proofread your questions before you posted them.