Question

find the area of a triangular park whose sides are 30 cm 25 cm and 15 .



by using herons formula​

Answer 1

Answer:

this is the correct answer

Step-by-step explanation:

hope it helps

Answer 2

Given :

• Sides of Triangle are 30 cm , 25 cm and 15 cm .

To Find :

• Area of Triangle By Heron's Formula .

Solution :

For Semi Perimeter :

$\longmapsto\tt{s=\dfrac{30+25+15}{2}}$

$\longmapsto\tt{s=\dfrac{70}{2}}$

$\longmapsto\tt{s=\cancel\dfrac{70}{2}}$

$\longmapsto\tt\bf{s=35\:cm}$

By Heron's Formula :

Here :

• a = 30 cm
• b = 25 cm
• c = 15 cm

$\longmapsto\tt\bf{Area=\sqrt{s(s-a)\:(s-b)\:(s-c)}}$

$\longmapsto\tt{\sqrt{35(35-30)\:(35-25)\:(35-15)}}$

$\longmapsto\tt{\sqrt{35(5)\:(10)\:(20)}}$

$\longmapsto\tt{5\times{7}\times{5}\times{5}\times{2}\times{5}\times{2}\times{2}}$

$\longmapsto\tt{5\times{5}\times{2}\sqrt{7\times{2}}}$

$\longmapsto\tt\bf{50\sqrt{14}\:{cm}^{2}}$

So , The Area of Triangle is 50√14 cm² .