Hello plz help me
,Tell me Q1(both parts) and Q2 answers of practise now "8" with solutions

1a.

The total of the exterior angles of a polygon is always 360 degrees.

So if each one is 40, that's 360/40 = 9 sides

9 sides

1b.

178 degree interior angle means a two degree exterior angle so 360/2 = 180 sides.

180 sides

2.

A decagon is a 10 gon, so external angles 360/10 = 36 degrees and internal angles that are the supplement, 144 degrees.

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)