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In a quadrilateral ABCD, the measure of three angles A, B, C are 110 degree, 70 degree, & 80 degree. Find the measure of third angle? a) 120 degree b) 100 degree c) 90 degree d) 105 degree?
Most Upvoted Answer
In a quadrilateral ABCD, the measure of three angles A, B, C are 110 d...
The sum all angles of quadrilateral is 360 degree.
A+B+C+D= 360- (80+110+70)
=360-260=100.
Community Answer
In a quadrilateral ABCD, the measure of three angles A, B, C are 110 d...
And 80 degree, respectively. To find the measure of angle D, we can use the fact that the sum of the angles in a quadrilateral is 360 degrees. Thus, we have:

A + B + C + D = 360

Substituting the given values, we get:

110 + 70 + 80 + D = 360

Simplifying the left side, we get:

260 + D = 360

Subtracting 260 from both sides, we get:

D = 100

Therefore, the measure of angle D is 100 degrees.
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In a quadrilateral ABCD, the measure of three angles A, B, C are 110 degree, 70 degree, & 80 degree. Find the measure of third angle? a) 120 degree b) 100 degree c) 90 degree d) 105 degree?
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