Question

. Find the perimeter of
(i) a triangle of sides 7.8 cm, 6.5 cm and 5.9 cm,
(ii) an equilateral triangle of side 9.4 cm,
(iii) an isosceles triangle with equal sides 8.5 cm each and third side 7 cm​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

(1) 7.8+6.5+5.9 = 20.2cm

(2) 9.4+9.4+9.4 = 28.2cm

(3) 8.5(2) + 7 = 24cm

Step-by-step explanation:

1)A perimeter is the sum of the sides.

2)When an equilateral triangle, the sides are of the same length, therefore a+a+a= 3a.

3)In an isosceles triangle, 2 sides are equal. Therefore a+a+b= 2a+b.

Hope it helpss!!!