Question

plz give the answer fast and correct
I will Mark AS BRAINLIST to you​

Answer 1

Mean answer is 9✓15

Understood

Answer 2

$\huge\bold\red{AnSwer✿᭄}$

ᴏᴘᴛɪᴏɴ⇴ⓐ

Aɴsᴡᴇʀ ⇴ 9√15

ᴇxᴘʟᴀɴᴀᴛɪᴏɴ:-

$area \: of \: triangle \: = \sqrt{s(s - a)(s - b)(s - c)}$

Here, S is a semi perimeter

and a,b,c are the sides of triangle

Gɪᴠᴇɴ:-

• ᴀ= 12 ᴄᴍ
• ʙ= 12 ᴄᴍ
• ᴘᴇʀɪᴍᴇᴛᴇʀ = 30 ᴄᴍ

$semi \: perimeter = perimeter \div 2$

$s = 30 \div 2$

$s = 15$

we need to find c:-

perimeter = 30cm

a+b+c = 30

12+12+c= 30

c = 30-24

c = 6

$area \: of \: triangle \: = \sqrt{s(s - a)(s - b)(s - c)}$

$= \sqrt{15(15 - 12)(15 - 12)(15 - 6)}$

$= \sqrt{15(3)(3)(9)}$

$= \sqrt{15(9)(9)}$

$= \sqrt{9 \times 9 } \times \sqrt{15}$

$= 9 \sqrt{15}$

∴ᴀʀᴇᴀ ᴏғ ᴛʀɪᴀɴɢʟᴇ ɪs 9√15