Question

the three angle of a quaridatral measure 40,120 and 100 find the fourth angle​

Answer 1

Answer:

100

Step-by-step explanation:

40 + 120 + 100 + x = 360

260 + x = 360

x = 360 - 260

x = 100

Answer 2

Answer:

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Step-by-step explanation:

We know that sum of all angles in a quadrilateral is 360 °

So

40° + 120° + 100° + x° = 360°

260° + x° = 360°

∴ x° = 360°- 260°

∴ x° = 100°

Hence. measure of 4th angle is 100°