Math, asked by tiwariarvind093, 7 months ago

किसी त्रिभुज की माध्यिका है 12 15 और 18 सेंटीमीटर है उस त्रिभुज का क्षेत्रफल बताइए​

Answers

Answered by kulalmanya
5

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Answered by amitsnh
1

Step-by-step explanation:

area of a triangle whose medians are a, b and c is given by

__________

A = (4/3)√s(s-a)(s-b)(s-c),

where s= (a+b+c)/2

a= 12 cm, b= 15 cm and c = 18 cm

s= (12+15+18)/2 = 45/2

___________________________

area = (4/3)√(45/2)*((45/2-12)*(45/2-15)*(45/2-18)

_________________

= (4/3)*√ (45/2)*(21/2)*(15/2)*(9/2)

= (4/3)*(1/4)*9*5*3*√7

= 9*5*√7

= 45√7 sqcm

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