Question

D) Why does a reflection of a triangle ABC in /AC show that triangle ABC=triangle ADC?

Answer 1

When triangle ABC is reflected upon the side AC, all the vertexes of triangle ABC coincides with all the vertexes of triangle ADC or the triangle ABC coincides exactly with the triangle ADC. Two traingles are said to be congruent if one triangle coincides exactly with the vertices of the other triangle. THEREFORE, THE REFLECTION OF TRIANGLE ABC SHOWS

`\Delta\text{ABC}\cong\Delta\text{ADC}`