Maths-
General
Easy
Question
The sides of a triangle are 8cm, 15cm and 17cm. find its perimeter and its area. Also find the length of the altitude drawn on the side with length 17cm.
Hint:
The correct answer is: 7.05 cm
Let a = 15 cm , b = 8 cm , c = 17 cm
Perimeter = Sum of all sides = a + b + c
= 15 + 8 + 17 = 40 cm
Using Heron’s formula,
Area of triangle = 
where s = 
s = 
= 20
Area of triangle = 
= 
= (4)(5)(3) = 60 cm2
Also, Area of triangle = 
b 
h
60 = 17 h
h = 
⇒ h = 7.05 cm
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