2017 · Q97
In the figure given below, ABC is a triangle with AB = BC and D is an interior point of the triangle ABC such that ∠ DAC = ∠ DCA.Consider the following statements :
- 1Triangle ADC is an isosceles triangle.
- 2D is the centroid of the triangle ABC.
- 3Triangle ABD is congruent to the triangle CBD.
Which of the above statements are correct ?
Elementary MathematicsGeometry: Lines, Angles and Triangles
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
∠DAC = ∠DCA makes ΔADC isosceles (statement 1 true). Nothing makes D the centroid (statement 2 false). AB = BC, AD = DC (from 1), BD common give ΔABD ≅ ΔCBD by SSS (statement 3 true). So 1 and 3 only: option C.