Question

find the perimeter of each of the following shapes
a) an equilateral triangle of side 7.8cm
b) an triangle of side 11cm ,9cm and 6cm
c) an usoscles triangle with equal sides 7cm each and third side 5cm.
d) a regular pentagon with each side measuring 10.2cm​

Answer 1

Answer:

a) 7.8*3

b) 11+9 +6

c) 7*2+5

d) 10.2*5

Step-by-step explanation:

small equation

Answer 2

Answer:

a) perimeter of equilateral ∆ = 3× side

= 3× 7.8

=23.4cm

b) perimeter of ∆ = sum of all sides

= 11+9+6

=26cm

c) perimeter of isosceles ∆ = 2× equal side + 3rd side

= (2×7)+5

=14+5

=19cm

d) perimeter of regular pentagon = 5× side

=10.2×5

=51cm

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