Question

find plllllmshhsgeheh

Answer 1

angleBDC=angleDBC(angles opposite to equal sides of a triangle are equal)
In triangle BCD,
angle BDC +angle DBC +BCD=180°
2 angle BDC +40°=180°
2angleBDC=140°
angle BDC=70°
it is clear that ABD is an equilateral triangle
so each angle =60°
angle ABD+angleBDC=angle ABC
60°+70°=angleABC
130°=angleABC