Question

abc and dbc are two isosceles triangles on the same base bc such that d lies in the interior of triangle abc if a = 50 and d = 80 then find abd

question no.105​

Answer 1

Answer:

15

Step-by-step explanation:

if angle A =50

then angle B = angle C =(180-50)/2= 130/2=65

same way

angle D =80

that means angle DBC= angle DCB=(180-80)/2= 100/2 =50

now

angle ABC = angle ABD+angle DBC

65=angle ABD+50

angle ABD=65-50=15