Construct ΔLMN, in which ∠M =60°, ∠N =80° and LM+MN+NL=11cm.

Given: ∠Q =70°,

∠R = 80° and

perimeter of Δ PQR

Steps of construction:

i: Draw a line segment AB of 11cm.

ii: From point A draw a ray AD at 60° and from B draw a ray BE at 80°

iii: Draw an angle bisector of A and B, two angle bisectors intersect each other at point P.

iv: Draw a line bisector of AP and BP respectively these two-line bisectors intersect at point Q and R

v: Join PQ AND PR

vi: Δ PQR is required triangle.