NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 6: Triangles - Problems and SolutionsQuestion 144
Class 7 - Mathematics - Unit 6: Triangles - Problems and Solutions
Question. 144
ABC is an isosceles triangle with AB = AC and D is the mid-point of base BC (Fig. 6.48).
(a) State three pairs of equal parts in the triangles ABD and ACD.
(b) Is ΔABD ≅ ΔACD? If so why?
Answer:
(a) AB = AC, BD = CD, AD = AD
(b) Yes, by SSS criterion
Detailed Answer with Explanation:
All three corresponding sides equal, hence congruent by SSS.