Question

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

Answer 1

If sides are

• 9cm
• 4.5cm
• 12cm

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

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

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

`\\ \sf\longmapsto Perimeter=25.5cm`

Answer 2

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

• Sides of triangle are 9cm , 4.5cm and 12cm.

`\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