Find the area of triangle two sides of which are 18cm and 10ccm and the perimeter is 42 cm.
Excel in Class 9th Maths with NCERT solutions and MCQ-based questions from Chapter 10: Heron’s Formula. Solve exercise questions, short-answer problems and detailed explanations to grasp the concept of calculating areas when the lengths of all three sides of a triangle are given. These resources align with the CBSE syllabus, ensuring thorough exam preparation. Regular practice will enhance your understanding of Heron’s Formula and boost your confidence. Use step-by-step solutions and revision notes to simplify learning. Begin now to secure higher scores in exams.
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Using Heron’s formula:
Sides: a = 18 cm, b = 10 cm, c = 14 cm
Semi-perimeter (s) = 21 cm
Area = √[s(s-a)(s-b)(s-c)]
= √[21(21-18)(21-10)(21-14)]
= √[21 × 3 × 11 × 7]
= 21√11 cm²
This question is connected to Chapter 10, “Heron’s Formula,” in the Class 9 NCERT Mathematics textbook. It focuses on applying Heron’s Formula to calculate the areas of triangles and quadrilaterals, not Probability. Provide your response based on the concepts from this chapter.
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