Question

please tell step by step​

Answer 1

Answer:

8. each exterior angle = 360/15 = 24°

each interior angle = 180-24 = 156°

Answer 2

Answer:

8. exterior angle = 24 degrees

Each interior angle = 156 degree

9. length =  4.33cm

   breadth =  1.33cm

Step-by-step explanation:

8. No.of sides of regular polygon = 15 sides.

   Exterior angle of a polygon = 360 ÷ number of sides.

                                                  = 360/15

                                                  =24 degrees.

Sum of Interior angle of a polygon = (2n-4)*right angles

                                                = (30-4)*90

                                                = 26*90            

                                                = 2340 degree

   Each interior angle = 2340/15

                                   = 156 degree

9. let breadth of rectangle = x cm

    so, length = x+3 cm

Area = x*(x+3)

 length is increased by 2 cm = (x+3)+2 cm

 breadth is decreased by 1 cm = x-1 cm

ATP:-

(x+3)+2 cm*x-1 cm = x*(x+3)

or, x+5*x-1 = x^2 + 3

or, x^2-x+5x-5 = x^2 + 3

or,  x^2-x^2x+5x = 3+5

or, 6x = 8

or, x = 8/6 = 1.33cm

x+3 = 4.33cm