An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find the area of the triangle.
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Ncert Math Solutions Class 9th Chapter 12 Heron’s Formula Exercise 12.1 Question 5
Sides of a triangle are in the ratio of 12 : 17 : 25 and its perimeter is 540 cm. Find its area.
Ncert Math Solutions Class 9th Chapter 12 Heron’s Formula Exercise 12.1 Question 4
Find the area of a triangle two sides of which are 18 cm and 10 cm and the perimeter is 42 cm.
Ncert Math Solutions Class 9th Chapter 12 Heron’s Formula Exercise 12.1 Question 3
There is a slide in a park. One of its side walls has been painted in some colour with a message “KEEP THE PARK GREEN AND CLEAN” (see figure). If the sides of the wall are 15 m, 11 m and 6 m, find the area painted in colour.
Ncert Math Solutions Class 9th Chapter 12 Heron’s Formula Exercise 12.1 Question 2
The triangular side walls of a flyover have been used for advertisements. The sides of the walls are 122 m, 22 m and 120 m. The advertisements yield an earning of Rs 5000 per
per year. A company hired one of its walls for 3 months. How much rent did it pay?