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Hi! Um, I need help on these ASAP please and thank you. I am completely unsure how to do them, and if someone can explain how to do them that would be great. I don't want to get anything wrong. Thank you so much!!!

Guest Feb 26, 2018
 #1
avatar+14414 
+2

Opposit angles in a quadrilateral add to 180 (supplementary)

1. 3x+6   +   x+2  = 180

     4x = 172

       x = 43        A= 3x+6 = 3 x 43   + 6 = 135 degrees

2 and 3 are similar

 

4 all of the angles in a quadrilateral add to 360   

ElectricPavlov  Feb 26, 2018
edited by ElectricPavlov  Feb 26, 2018
 #4
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0

Thank you!

Guest Feb 26, 2018
 #2
avatar+92367 
+2

Second one :

 

4x - 20  + x   =  180

5x - 20  =  180     add 20 to both sides

5x  = 160    divide both sides by 

x  = 32°

 

Third one :

 

116 + x   = 180     subtract  116 from both sides

x  = 64

So A = 2(64) - 40  =  128 - 40  =  88°

 

 

Last one :

 

x + 10  + x + 24  =  180

2x + 34  =  180      subtract 34 from both sides

2x  = 146         divide both sides by 2

x  = 73

 

So

A + C  = 180

(x + 15) +   C   =  180

(73 + 15) + C  = 180

88 + C   =  180  subtract 88 from both sides

C  = 92°

 

 

cool cool cool

CPhill  Feb 26, 2018
 #3
avatar
0

Thank you!!

Guest Feb 26, 2018

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