Question

2. Three angles of a quadrilateral measure 56°, 115º and 84º. Find
the measure of the fourth angle.​

Answer 1

Step-by-step explanation:

56+115+84+x= 360

255+x=360

x=360-255

x= 105

Answer 2

Answer:

105°

Step-by-step explanation:

let angle of quadrilateral be a, b, c and d

a+b+c+d=360(ang sum prop of quadrilateral)

56+115+84+d=360

255+d=360

d=360-255

d=105

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