Question

If 3 angles of quadrilateral are 50°, 70°,
100° then find the fourth angle measures
*​

Answer 1

Answer:

∠4 = 140°

Step-by-step explanation:

Sum of 3 sides = 50+70+100

                         = 220°

Angle sum of a quad. = 360°

∴∠4 = 360-220

       = 140°

Answer 2

Given : 3 angles of quadrilateral are 50°, 70°, 100°

To Find : fourth angle measure

Solution:

Let say  fourth angle measure  = a

Sum of 4 angles of a quadrilateral = 360°

=> 50° + 70° + 100°  + a  = 360°

=> 220° +  a  = 360°

=> a = 140°

fourth angle measure  = 140°

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