Question

find the value of x. reason it. ​

Answer 1

Answer:

in ∆ABD,

AD=BD

angle ABD = ANGLE BAD=50

ANGLE ADB = 80 ( angle sum property)

angle ADC= 100( LINEAR PAIR)

IN ∆ ADC,

AD= DC

MEANS ANGLE DAC = ANGLE = DCA

ANGLE ( ADC+ACD+DAC) =180.

100 + ACD + DAC= 180

100+ 2ACD= 180 ( ACD= DAC)

2ACD=80

ACD= 40 = DAC = x = 40 degree Àñßwér.