Question

The three angles of a quadrilateral are 61°, 77° & 117º. Find the measure of the fourth angle.​

Answer 1

Answer:

105°

Step-by-step explanation:

Let the fourth angle be x

x+61°+77°+117°=360°

x+255°=360°

x=360°-255°

x=105°

Answer 2

Answer:

105°

Step-by-step explanation:

total angle of a quadrilateral= 360°

61°+77°+117°+X°=360°

255+X°=360°

X°=360°-255

X°=105°

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