Question

Find the semi perimeter of a triangle whose sides are 20cm , 30cm and 40cm

Answer 1

Answer:

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Step-by-step explanation:

perimeter of triangle = 20cm + 30cm + 40cm

perimeter of triangle = 90cm

semi perimeter =90/2

semi perimeter =45

Answer 2

$\rm \rightarrowtail \: Semi-Perimeter = \dfrac{a + b + c}{2}$

$\rm \rightarrowtail \: Semi-Perimeter = \dfrac{20 + 30+ 40}{2}$

$\rm \rightarrowtail \: Semi-Perimeter = \dfrac{50 + 40}{2}$

$\rm \rightarrowtail \: Semi-Perimeter = \dfrac{90}{2}$

$\rm \rightarrowtail \: Semi-Perimeter = \cancel \dfrac{90}{2}$

$\\\therefore{ \boxed{ \frak \green{ \: Semi-Perimeter =45cm}}}$