the angles of a Pentagon are x°,2x°(x+30)°,(x+40)°,find x

That's only 4 angles.

You know they add up to 540°, so figure out the 5th angle, and add 'em up, solve for x.

x+x+x+x+x+x

-10+10=0
ans=6x+30

Jji

Bn

To find the value of x in a pentagon, we need to use the fact that the sum of the interior angles of a pentagon is equal to 540 degrees.

Let's break it down step by step:

1. The angles of the pentagon are given as:
- x°
- 2x°
- (x+30)°
- (x+40)°
- ?

2. Summing up the angles:
x + 2x + (x+30) + (x+40) + ? = 540

3. Simplify by combining like terms:
5x + 70 + ? = 540

4. Move the constant term to the right side:
5x + ? = 470

5. To find the value of x, we need to find the missing angle. Subtract 470 from 540 and set it equal to the missing angle:
? = 540 - 470

6. Calculate the missing angle:
? = 70 degrees

Therefore, the missing angle in the pentagon is 70 degrees.