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The perimeter of equilateral triangle is 60 m, then its area is

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Important Questions on Heron's Formula

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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 3
The sides of a triangle are 56 cm, 60 cm and 52 cm long. Then the area of the triangle is
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 4

The area of an equilateral triangle with side 23 cm is

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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 5
The length of each side of an equilateral triangle having an area 93 cm2 is
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 6
If the area of equilateral triangle is 163cm2, then the perimeter of the triangle is 
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 7
The sides of a triangle are 35 cm, 54 cm and 61 cm, respectively. Then, length of its longest altitude is 
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 8
The area of an isosceles triangle having base 2 cm and length of its equal sides 4 cm is
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 9
The edges of a triangular board are 6 cm, 8 cm, and 10 cm. The cost of painting it at the rate of 9 paise per cm2 is
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NCERT Exemplar Mathematics - Class 9>Chapter 12 - Heron's Formula>Exercise>Q 1
The area of a triangle with base 4 cm and height 6 cm is 24 cm2.