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Hi everyone,

Today i had a Maths test of 3o marks in school today and i found it hard for me as im not that good in Quadrilaterals!so out here ive got a question for you all to answer and explain me so nicely for i want to know whats its answer as i got this one in the test!so heres it!

Find all the angles of a parallelogram one of whose angles is 55°.

so that was the question and you also along with writing the angles you also have to give the reasons for them like one reason is "in a parallelogram opposite angles are equal"!

so please explain me this nicely becoz u know why!

 Jul 7, 2014

Best Answer 

 #1
avatar+118623 
+10

Okay rosala,

Opposite angles in a parallelogram are equal so the opposite angle is 55 degrees

Now the angle sum of any quadrilateral (4sides) is 360 degrees so

55+55+x+x = 360       (the four angles add up to 360degrees and opposite angles are equal)

110+2x=360

2x=250

x=125

so the angles are 125, 125, 55, and 55 degrees.    

 Jul 7, 2014
 #1
avatar+118623 
+10
Best Answer

Okay rosala,

Opposite angles in a parallelogram are equal so the opposite angle is 55 degrees

Now the angle sum of any quadrilateral (4sides) is 360 degrees so

55+55+x+x = 360       (the four angles add up to 360degrees and opposite angles are equal)

110+2x=360

2x=250

x=125

so the angles are 125, 125, 55, and 55 degrees.    

Melody Jul 7, 2014
 #2
avatar+11912 
+5

Melody the reason i gave you was just an example of someother reasons!so is there any other formula we can use to find out using other reasons !

 Jul 7, 2014
 #3
avatar+11912 
+5

But though Thanks for telling me the answer!Thumbs up from me!

 Jul 13, 2014

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