Math, asked by muskan5018, 1 year ago

please solve this problem

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Answered by kingfisher801

Answer:

Answer is 90cm

Step-by-step explanation:

area of tria

ngle =1/2*base *height

Answered by Anonymous

SOLUTION:-

Given:

In an isosceles triangle:

⚫AB= 15cm.............(A)

⚫AC= 15cm.............(B)

⚫BC= 12cm.............(C)

Now,

We using the Heron's formula:

$S = \frac{A+ B + C}{2} \\ \\ = > S= \frac{15 + 15 + 12}{2} \\ \\ = > S = \frac{42}{2} \\ \\ = > S = 21cm$

Now,

We know that the area of triangle by the Heron's formula:

$Area = \sqrt{S(S- A)(S- B)(S - C)} \\ \\ = > A= \sqrt{21(21 - 15)(21 - 15)(21 - 12)} \\ \\ = > A = \sqrt{21(6)(6)(9)} \\ \\ = > A = \sqrt{3 \times 7 \times 2 \times 3 \times 2 \times 3 \times 3 \times 3} \\ \\ = > A = 2 \times 3 \times 3 \sqrt{21} \\ \\ = > A = 18 \sqrt{21} {cm}^{2}$

Hence,

So, area required is 18√21cm².

Hope it helps ☺️

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SOLUTION:-

Given:

Now,

Now,

Hence,

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please solve this problem