Question

formula of triangles of class 9​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation: Formula for perimeter of triangle= Side +Side +Side

Area of equilateral triangle= √3/4 × s²

Area of Triangle=1/2 × b × h

Area of triangle by Heron's Formula= √s×(s-a) × (s-b) × (s-c)    WHERE s = SEMI PERIMETER