The perimeter and area of a triangle whose sides are of length 3cm , 4cm , and 5cm respectively are - A) 12 cm , 6 cm square B) 12 cm , 12 cm square C) 6 cm , 6 cm square D) 6 cm , 12 cm square
Answers
Answered by
60
Answer :
The perimeter of the triangle is 12 cm and the area of the triangle is 6 cm.
Given :
- 3 sides of the triangle is 3 cm , 4 cm and 5 cm respectively.
To find :
- Perimeter and area of the triangle.
Solution :
Consider,
- 3 sides of the triangle is a cm, b cm and c cm respectively.
★Formula used :-
Then,
Perimeter of the triangle,
= (3+4+5) cm
= 12 cm
Therefore, perimeter of the triangle is 12 cm.
★Formula Used :-
Where,
- a = 3 cm
- b = 4 cm
- c = 5 cm
- s = 12/2 = 6 cm
Area of the triangle ,
=
= cm²
= cm²
= cm²
= 6 cm²
Therefore , the area of the triangle is 6 cm².
Answered by
92
Step-by-step explanation:
- The sides of the triangle are
- 3cm , 4cm and 5cm.
- The perimeter of the triangle.
- The area of the triangle.
As we know that:-
The perimeter of the triangle is given by the formula:-
Here:-
• a , b and c are the sides of the triangle.
Now
Perimeter of the triangle
= 3 + 4 + 5
= 12cm
Now, area of the triangle is given by the formula:-
Here
• a = 3cm
• b = 4cm
• c = 5cm
•
Area of the triangle:-
Perimeter of triangle= 12cm
Perimeter of triangle= 12cmArea of triangle = 6cm
Hence;
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