Question 1

9cm 4. 5cm 12 см.
find the perimeter and the area of the above figures

Question 2

If sides are

$\\ \sf\longmapsto Perimeter=Sum\:of\:sides$

$\\ \sf\longmapsto Perimeter=9+4.5+12$

$\\ \sf\longmapsto Perimeter=13.5+12$

$\\ \sf\longmapsto Perimeter=25.5cm$

Question 3

$\large\begin{gathered} {\underline{\boxed{ \rm {\purple{Perimeter\:_((Triangle) \: \large= \large\:Sum \: of \: all \: sides)}}}}}\end{gathered}$

$\large\bf{\red{ \longrightarrow}} \tt \: \:9 \: cm \: + \: 4.5 \: cm \: + \: 12 \: cm$

$\large\bf{\red{ \longrightarrow}} \tt \: \:13.5 \: cm \: + \: 12 \: cm$

$\large\bf{\red{ \longrightarrow}} \tt \: \:25.5 \: cm$

Hence , the perimeter of triangle is 25.5 cm

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