Question

6. The perimeter of a triangle is 75 cm. Two of the
sides are 20 cm and 30 cm, find the third side.​

Answer 1

Answer:

25 cm

Step-by-step explanation:

perimeter of the triangle= sum of the three sides

75=20+ 30+ third side

75-50=third side

25=third side

Answer 2

Given:-

• Perimeter of triangle = 75 cm.
• Two sides of triangle are 20 cm and 30 cm.

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To find:-

• Third side of triangle.

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$\huge \tt \: ☃ \: Solution$

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Perimeter of triangle = a + b + c

In which a , b and c are sides of triangle

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So, Put the values

⇒ 75 = 20 + 30 + c

⇒75 = 50 + c

⇒75 - 50 = c

⇒25 = c

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Therefore, Third side of triangle is 25 cm.

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More information:-

• Area of triangle = 1/2 × base × height