Question

XII. If the perimeter of a triangle is 40 cm and two sides are 10 cm and 14 cm, then find
its third side ?
a) 24 cm
b) 16 cm
c) 26 cm
d) 64 cm​

Answer 1

Answer:

16 is the correct answer I think so

Answer 2

• Given

• Perimeter of a triangle = 40 cm
• Measure of two sides - 10 cm and 14 cm

• To find

• Its third side.

• Solution

Let the third side be x.

• Perimeter = Sum of all sides.

Substitute the given values.

⇛ 40 = 10 + 14 + x

⇛ 40 = 24 + x

⇛ 40 - 24 = x

⇛ 16 = x

• The value of x is 16

•°• Third side = 16 cm

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Verification -

⇛ 40 = 10 + 14 + x

Put the value of x.

⇛ 40 = 10 + 14 + 16

⇛ 40 = 40

LHS = RHS

Hence, verified.

• Answer ⇛ (b) 16 cm