Question

Riya what three times around a regular pentagon playground and covered a distance of 600m.a) calculate the perimeter of the playground.b) find the length of each side of the playground

Answer 1

Answer:

a)perimeter=600/3=200m b)each side=200/5 =40m

Step-by-step explanation:

Answer 2

Solution:-

Let there is a right angled triangle with sides AC, AB and BC and AC be the longest side of this triangle.

So, in Δ ABC   AC = 1 m, AB = 80 cm or 0.8 m and BC = ?

AC² = AB² + BC²

(1)² = (0.8)² = (BC)²

(BC)² = 1 - 0.64

(BC)² = 0.36

BC = 0.6 m

Now, the area of the triangle = 1/2 × Base × Height

= 1/2 × 0.6 × 0.8

Area of triangle = 0.24 sq m

Cost of scarf = 250 × 0.24

= Rs 60

Answer.