Question

3. Calculate the third side of the following triangles when the perimeter and two of the sides are
given :
(a) P = 125 cm, 32 cm, 46 cm
(b) P = 76.5 cm, 23 cm. 295 cm​

Answer 1

Answer:

a.  47 cms

b.  24 cms

Step-by-step explanation:

Perimeter of the triangle is equal to the sum of all its sides.

(a) P = 125 cm, 32 cm, 46 cm

Perimeter = side 1 + side 2 + side 3

125 = 32 + 46 + side 3

125 = 78 + side 3

Side 3 = 125 - 78

Side 3 = 47 cms

(b) P = 76.5 cm, 23 cm. 29.5 cm​

Perimeter = side 1 + side 2 + side 3

76.5 = 23 + 29.5 + side 3

76.5= 52.5+ side 3

Side 3 =76.5 - 52.5

Side 3 = 24 cms