Question

5. Find the third side of the triangle whose
(a) two sides = 3 cm and 5 cm; perimeter = 12 cm​

Answer 1

Answer:

4 cm

Step-by-step explanation:

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Let the unknown side be x

Perimeter = 1st Side + 2nd Side + 3rd Side

12 = 3 + 5 + x

x = 12 - 3 - 5

x = 4

Answer 2

Answer:

Third side = 4 cm

Hope it will help you...