pls answer this using heron's formula..
pls give me the answer as step-by-step explanation
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Answer:
a=18cm b=10cm and let the third side be 'c'
a+b+c=perimeter
18+10+c=42
28+c=42
c=42-28
c=14cm
s=a+b+c/2
s=18+10+14/2
s=42/2
s=21cm
Area of triangle=√s(s-a) (s-b) (s-c)
=√21(21-18) (21-10) (21-14) cm^2
√21×3×11×7 cm^2
√7×3×3×11×7 cm^2
7×3×√11 cm^2
21√11 cm^2
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Answer:
Given that : Measures of three sides of the triangle are 18 cm and 10 cm and Perimeter of Triangle is 42 cm.
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Now,
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⠀⠀⠀⠀⠀Finding Third Side of Triangle :
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⠀⠀⠀⠀⠀Finding Semi-Perimeter of Triangle :
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⠀⠀⠀⠀⠀Finding Area of Triangle :
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