Parallelogram L M N O is shown. Angle L is (x + 40) degrees and angle O is (3 x) degrees. What is the measure of angle O in parallelogram LMNO? 35° 75° 105° 155

So the two opposite sides of a parallelogram is equal to each other and the two adjacent angles are supplementary. So if (x+40)+3x=180, this means that 4x+40=180. This gives us 4x=140, so x=35. If we plug it back into the equation it ascertains as such: 3(35)= 105. The answer for this question and angle O is 105 degrees, or C.

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ogorwyne ogorwyne · Answer 2 · 2022-01-26T21:21:15+01:00

The measure of angle O in this parallelogram is 105°.

The properties of a parallelogram

The opposite angles of a parallelogram are equal.

The Opposite sides of the parallelogram are equal and parallel.

The diagonals of the parallelogram bisect each other.

The Sum of the angles = 360°

Solution

Because the properties says that opposite angles are equal.

Angle L = (x + 40)

angle O = (3 x)

Applying the first property

x+40+x+40+3x+3x = 360

collect the like terms

x+x+3x+3x+40+40 = 360

8x+80 = 360

8x = 360-80

8x = 280

Divide through the equation by 8

x = 280/8

x = 35

The question wants us to find the value of angle O

O = 3x

O = 3*35

= 105

The value of angle O is equal to 105°