Question

In the adjoining figure, ∆ ABC ≅ ∆ ADC. If ∠BAC = 30° and ∠ABC = 100° then
∠ACD = ??

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

if angle BAC= 30 and angleABC =100 then using congurency

angleBAC = angle DAC

angle ABC= angle ADC

angle ACB= angle ACD

therefore ,

angle ACB =180-(angle ABC +angle BAC)

=180-100-30

=50

angle ACD= angle ACB

angle ACD= 50 degree