The area of triangle with given two sides 18 cm and 10 cm respectively and perimeter equal
to 42 cm is:
a. 20√11 cm2
b. 19√11 cm2
c. 22√11 cm2
d. 21√11 cm2
Q.9. Find the area of a triangle whose sides are respectively 9 cm, 12 cm and 15 cm.
Answers
Answered by
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Answer :-
- Area of Triangle = 21√11 cm²
Given :-
- First Side (Side a) = 18 cm
- Second Side (Side b) = 10 cm
- Perimeter of triangle = 42 cm
To Find :-
- Area of Triangle = ?
Explanation :-
In order to find the area of the triangle first we need to find the Third Side (Side c) of the Triangle.
Let the Third Side (Side c) to be 'x' cm.
Now, Finding the Area of Triangle using Heron's Formulae.
Where,
- s = Semi - Perimeter of the Triangle
- a = First side of the Triangle
- b = Second side of the Triangle
- a = Third side of the Triangle
Now Substituting the values,
Hence, the area of the triangle is 21√11 cm².
@Agamsain
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