NCERT Exemplar Solutions
Class 7 - Mathematics - Unit 6: Triangles - Problems and SolutionsQuestion 141
Class 7 - Mathematics - Unit 6: Triangles - Problems and Solutions
Question. 141
The lengths of two sides of an isosceles triangle are 9 cm and 20 cm. What is the perimeter of the triangle? Give reason.
Answer:
49 cm
Detailed Answer with Explanation:
Isosceles triangle means two equal sides. So sides are 20, 9, 20. Perimeter = 20 + 20 + 9 = 49 cm. Condition: sum of any two sides greater than third is satisfied.