Two angles of a quadrilateral each measure 90°. A third angle of the quadrilateral measures 125°.

What is the measure of the fourth angle of the quadrilateral?

A.
55°

B.
65°

C.
90°

D.
125°

Question

Two angles of a quadrilateral each measure 90°. A third angle of the quadrilateral measures 125°.
 
What is the measure of the fourth angle of the quadrilateral?
 
 A.
55°
 
 B.
65°
 
 C.
90°
 
 D.
125°

rainbow_rocks03 · Answer

need help with one more after this one

ajanijones · Answer

Im here lets see,

ajanijones · Answer

, the sum of the interior angles of a quadrilateral is 360 degrees, so you have 2(90)+125+x=360, solving for x you get x=55

campbell_st · Answer

well the angle sum of a quadrilateral is 360

so it should be straight forward to find the 3rd angle

ajanijones · Answer

If you need more help take a look here, http://www.mathsisfun.com/geometry/interior-angles-polygons.html

ajanijones · Answer

I hope I helped just tag me in a new question, Medal plz

rainbow_rocks03 · Answer

I really don't know this kind of stuff sometimes but my school is teaching this hard stuff and im only in 6th grade.

rainbow_rocks03 · Answer

YAY GOT 100%!!!!

ajanijones · Answer

Good job,