Question

A convex decagon has six side equal angles .Two angles are 20 degree more than one of six angles.Two more triangle are 40 degrees more than one of the six angles.Find the measure of each angle.

Answer 1

total of angles in a decagon = 1440
6x + 2(x+20) + 2(x+40) = 1440
6x + 2x + 2x + 40 + 80 = 1440
10x = = 1320

x =132
2x angles = 264
4xangles = 528

Answer 2

i assumed you were talking about interior angles

Answer 3

I'm an idiot
Six equal angles of 132
Two equal angles of 152
Two equal angles of 172
?

Answer 4

oh yes i worked out other angles incorrectly

Elixa has correct solution

Answer 5

But jimmy's calculations are right if you want working out sorry thanks

Answer 6

thank Eli and Jimm

Answer 7

why i doubled and X by 4 I dont know - lol!!

Answer 8

yw

Answer 9

Two angles are 20 degree more than one of six angles or each 20 more?

Answer 10

I think the sum of 2 angle is 20 more not each angle 20 more?

Answer 11

I take it to mean each of two angles is 20 more than one of the six equall angles

Answer 12

I was confused when i was working out the value of the two equal angles - i wrote down 2x instead of x + 20

Answer 13

6x + (x+20) + (x+40) = 1440
right?

Answer 14

Yes

Answer 15

ok, thank

Answer 16

six side equal angles, 2 angles (x+20) ,and 2 angles (x+40) ?

Answer 17

yes