Heather draws a polygon with x number of sides. The sum of the interior angles of her polygon is 60 times the number of sides. How many sides does Heathers polygon have?

hexacontagon

has 60 sides and interior angles is 10440 degrees.

Step-by-step explanation:

I kinda think its wrong but hope this helps, if its wrong, im sorry

Heather's polygon has 3 sides.

Step-by-step explanation:

S = 60x       Try plugging in number for x that will work

I found that when x = 3, the equation was true

S = 60x     Substitute

S = 60(3)   Multiply

S = 180      If the sum of the interior angles is 180, the only shape that can be made is a triangle, which has 3 sides.

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc