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Q3-The perimeter of a triangle is 20 cm. If two of its sides are 4.2 cm and 9 cm respectively, find the third side.ans-Q4-The perimeter of an equilateral triangle is 18.3 cm. Find the length of each side of the triangle.ans-please give this answer in full process then i will promise i mark you as branliest answer. |
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Answer» Answer: \huge\mathtt{\UNDERLINE{\underline{\red{SOLUTION:-}}}} SOLUTION:−
GIVEN:- perimeter of TRIANGLE=20cm and it's 2 sides => 4.2cm and 9cm we have to find the 3rd SIDE of triangle Let the 3rd side be x then we know that the perimeter of triangle =sum of all sides \mathbb{\underline{\underline{ACCORDING\:TO\: QUESTION:-}}} ACCORDINGTOQUESTION:−
\begin{gathered}\sf perimeter= sum \:of\:all\: sides\\ \\ \sf\implies 20= 4.2+9+x\\ \\ \sf\implies 20=13.2+x\\ \\ \sf\implies 20-13.2=x\\ \\ \sf\implies 6.8=x\end{gathered} perimeter=sumofallsides ⟹20=4.2+9+x ⟹20=13.2+x ⟹20−13.2=x ⟹6.8=x
The third side of triangle=6.8cm \sf\underline{\underline{\red{third\: side\:of\: triangle=6.8cm}}} thirdsideoftriangle=6.8cm
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