Class 9 Maths Chapter 10 Heron's Formula Practice Test Paper | DOE Support Material

Class 9 Maths Chapter 10 Heron's Formula Practice Test Paper | DOE Support Material

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If (sa) = 5 cm, (s – b) = 10 cm, (s – c) = 1 cm. Find s.

The sides of triangle are 35 cm, 54 cm and 61 cm. Find the length of its longest altitude.

Find the area of isosceles triangle whose equal sides are of length 15 cm each and the third side is 12 cm. (2)

If each side of triangle is doubled, then find the ratio of area of new triangle thus formed and the given triangle.

A triangular park ABC has sides 120m, 80m and 50m. A gardner has planted some trees inside the park leaving 5 m width along each side of park. Find the area in which he planted the trees.

The sides of a triangle are in the ratio 25 : 17 : 12 and its perimeter is 540 cm. Find the area of the triangle.

The length of sides of a triangle are 7 cm, 12 cm and 13 cm. Find the length of perpendicular from opposite vertex to the side whose length is 12 cm.

The cost of fencing an equilateral triangular field @ ₹5 per metre is ₹1920. Find its area & all sides.


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heron's formula - extra practice questions (part 1) | class 9 maths chapter 10