6
m
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KEEP THE PARK
GREEN AND CLEAN
4.
15 m
Fig. 12.10
Find the area of a triangle two sides of which are 18cm and 10cm and the perimeter is
42cm.
Sides of a triangle are in the ratio of 12:17:25 and its perimeter is 540cm. Find its area.
An isosceles triangle has perimeter 30 cm and each of the equal sides is 12 cm. Find
the area of the triangle.
5.
6.
12+12+1
24
Application of Heron's Formula in Finding Areas of Quadrilaterals
pose that a farmer has a land to be cultivated and she employs some labourers
purpose on the terms of wages calculated by area cultivated per square me
11 1 do thin? Many a time, the fields are in the shape of quadrilaterals
Answers
Answered by
2
Answer:
Explanation:
o find : Area of the triangle
Given:
Two sides of the triangle are 18 cm and 10 cm (Given)
Perimeter of the triangle = 42 cm
Perimeter of Triangle = Sum of sides of triangle
Let the third side of triangle be x, sox + 18 + 10 = 42
Third side of triangle, x = 42 – (18 + 10)
= 14 cm
Semi perimeter of triangle(s) =
= 21cm
Using Heron’s formula,
Area of the triangle =
=
=
=
= cm2
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