Question

Help please !
What is the measure of angle GCD?



116º
73º
29º
123º

Answer 1

start wid finding y

Answer 2

am guessing you meant X ? do i do 2x times 3x+2

Answer 3

The sum of all the angle sin the pentagon is 540.
so, 4y+4y+(3y+11)+103+(4y-9)=540.
solve for y to get the measure of y in degrees.
since EDH is a straight line. find the measure of angleCDH.
and then angle DCG can be found.

Answer 4

i dont get it at all

Answer 5

i got 29 for y

Answer 6

am not sure what to do afer i got y

Answer 7

check again, y = 29 is wrong

Answer 8

actually i am wrong, y = 29 is correct

Answer 9

hahaha lol i dont know what to do after that though

Answer 10

Next, find \(\angle EDC\)

Answer 11

how??

Answer 12

214?

Answer 13

EDC = 4y - 9
= 4(29) - 9
= 107

Answer 14

ohhhhhh i doubled it i though it was marking half stupid mistake ? :/
now i dont know what to do wit that number

Answer 15

look at the pic

Answer 16

CDH and EDC are forming a straight line, eh ?

Answer 17

yeah

Answer 18

Find CDH

Answer 19

they care the same aren't they?

Answer 20

nope, they add up to 180

Answer 21

CDH + 107 = 180

Answer 22

83 :)

Answer 23

73*

Answer 24

yes

Answer 25

CDH = 73

Answer 26

Now the last step

Answer 27

look at the right quadrilateral, how many angles u knw in it ?

Answer 28

1 the 74 right ?

Answer 29

just now we found CDH

Answer 30

and the H has a little square.

Answer 31

90

Answer 32

dont ignore a little square

Answer 33

yea 90.

Answer 34

123 :D

Answer 35

so, we knw 3 angles in it already. can we find GCD ?

Answer 36

i believe so i just did 360 -74-73-90

Answer 37

Excellent ! 123 is correct !!

Answer 38

ca you help me with one more these are the most confusing things i have ever seen in geometry

Answer 39

this is going to be easy :p

Answer 40

use this : sum of exterior angles in a polygon add up to 360