One angle of a quadrilateral has measure a degrees. Find the average of the measures of the other three angles. ( Hint: The sum of the measures of the angles of a quadrilateral is 360 degrees)

Question

anonymous · Answer

@Dobby1

dobby1 · Answer

hm

dobby1 · Answer

is there answer choices to look at

anonymous · Answer

no

dobby1 · Answer

hm not sure this is a tricky one

dobby1 · Answer

you did not give the number of degrees for the first angle in the first sentence

anonymous · Answer

its the variable a and its ( a degrees)

dobby1 · Answer

i am sorry i am pretty darn useles right not i dont want to get you a bad grade so i am just going to find someone who can help

anonymous · Answer

@mathstudent55

dobby1 · Answer

@amistre64

mathstudent55 · Answer

How do you find the average of 3 numbers?

anonymous · Answer

hmm i forgot...

mathstudent55 · Answer

Add the three numbers and divide by 3.

mathstudent55 · Answer

This means we need to find the sum of the other three angles. Then we divide that by 3 to find the average.

mathstudent55 · Answer

Notice the hint at the end of the problem.

mathstudent55 · Answer

The sum of the measures of the angles of a quadrilateral is 360 degrees.

mathstudent55 · Answer

You know one angle measures a degrees.
All 4 angles together measure 360 degrees.
What do the other 3 angles measure together?

anonymous · Answer

360 degrees/ 3 angles= 120 degrees

mathstudent55 · Answer

No.
1 angle measures a
All 4 angles measure 360.
The other 3 angles measure 360 - a

anonymous · Answer

oh so the sum of the other 3 angles is 360-a

mathstudent55 · Answer

|dw:1379432570957:dw|
a + m1 + m2 + m3 = 360
m1 + m2 + m3 = 360 - a