Question

13. The area of triangle with given two sides 18 cm and 10 cm respectively and perimeter equal to 42 cm
0 20root11 cm2
O 19root11 cm2
022root11 cm2
• 21 root11 cm2​

Answer 1

Answer:

21 root 11 cm^2

Step-by-step explanation:

Third side=42-18-10=14cm

Area of triangle = root of s(s-a)(s-b)(s-c)

s=18+10+14/2=21 cm

root of 21(21-18)(21-14)(21-10)

root of 21×3×7×11

root of 3×3×7×7×11

root of 3×7×11

21 root 11 cm^2

Hope it helps you