Triangles and are drawn on the same base such that ,

MATHEMATICS · Single correct · GCSE · Mathematics · Geometry and Measures · Geometry and Measures

Problem

Triangles

ABC

and

DBC

are drawn on the same base

BC

such that

AB = DC

AC = DB

, and

BC

is common to both triangles. If

\angle ABC = 42^{\circ}

, then

\angle DCB

is equal to (a)

60^{\circ}

(b)

42^{\circ}

(c)

69^{\circ}

(d)

48^{\circ}