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13. The area of triangle with given two sides 18 cm and 10 cm respectively and perimeter equal to 42 cm 0 20root11 cm2O 19root11 cm2022root11 cm2• 21 root11 cm2 |
| Answer» 21 ROOT 11 cm^2Step-by-step EXPLANATION:THIRD side=42-18-10=14cmArea of triangle = root of s(s-a)(s-b)(s-c)s=18+10+14/2=21 cmroot of 21(21-18)(21-14)(21-10)root of 21×3×7×11root of 3×3×7×7×11root of 3×7×1121 root 11 cm^2Hope it helps you | |