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CBSE Class 9 Answered

How to prove the Heron's formula?
Asked by ketanvai | 09 Sep, 2009, 04:35: PM
answered-by-expert Expert Answer

Heron's Formula is being derived fromthe basic formula of triangle  i.e 1/2baseXaltitude using Pythagoras theorem or sine and cosine formulae which you will learn in XI standard

Answered by | 10 Sep, 2009, 12:44: PM

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CBSE 9 - Maths
find the area of triangle whose sides are 40cm,24 cm,32cm?
Asked by seemarajpoot01101986 | 29 Nov, 2023, 04:40: PM
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CBSE 9 - Maths
find the area of a triangle two sides of which are 18cm and 10cm and it's perimeter is 42cm
Asked by shrikantsalunkhe1012 | 10 Jun, 2023, 06:47: AM
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CBSE 9 - Maths
Area of an isosceles right angled triangle is 50cm ² find the length of equal side
Asked by vasumathir1978 | 25 Aug, 2021, 11:08: AM
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CBSE 9 - Maths
the perimeter of a triangular field is 280 dm. If two of its sides are 78 dm and 50 dm,find the length of the perpendicular on the side of length 50 dm from the opposite vertex.
Asked by saanvichhikara07 | 23 Sep, 2020, 08:10: AM
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CBSE 9 - Maths
there is a slide in a park. One of its side walls has been painted in some colour with a message "keep the park clean and green if the sides of the wall are 1511 and 6 cm find the area painted in colour
Asked by kynarahman | 20 Aug, 2020, 07:53: PM
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CBSE 9 - Maths
Two sides of a triangle are 8cm and 11cm and it's perimeter is 32cm.The third side is : a)4cm b)13cm c)14cm d)16cm
Asked by arumugaperumalr17 | 09 Aug, 2020, 10:00: AM
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CBSE 9 - Maths
a parallelogram has two sides 16cm and 25 cm and the diagonal is 65m long .find the area of the parallelogram
Asked by gauravbhardwaj65950 | 25 Apr, 2020, 09:45: PM
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CBSE 9 - Maths
Aapka it in the shape of a square with diagonal 32 cm and an isosceles triangle of days. It's and and side 6 cm each has to be made of three different Shades as known as shown in the figure 12.17 how much paper of a ship has been used in
Asked by kirtisatpute995 | 14 Feb, 2020, 11:22: AM
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CBSE 9 - Maths
A kite in the shape of a square with a diagonal 32 cm and Isis kilis triangle of base 8 cm and side 6 cm each is to be made of three different Shades as shown in the figure 12.17 how much paper of each shade has been used in it. Has been used in it.
question image
Asked by kirtisatpute995 | 14 Feb, 2020, 11:21: AM
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CBSE 9 - Maths
A triangle has sides 35 cm 54 cm and 61 cm long find its area also find the smallest of it's altitude altitude altitude
Asked by karanbora625 | 29 Oct, 2019, 12:16: PM
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