Question

in a quadrilateral ABCD the measure of the 3 angles A, B and C of the quadrilateral is 100°,70° and 80° respectively. Find the measure of the fourth angle ​

Answer 1

Answer:

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Answer 2

Answer:

110°

Step-by-step explanation:

We know that sum of measures of all angles of a quadrilateral is 360°. (1)

So, we have A = 100°, B = 70°, C = 80° & D = x°

Now placing values in equation (1) we get,

100° + 70° + 80° + x° = 360°

250° + x° = 360°

x° = 110°

Hope this helps you!

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