Question

The three angles of a quadrilateral are 76º, 54º, and 108º. Find the measure of the fourth angle​

Answer 1

Answer:

122

Step-by-step explanation:

let it be x

76+54+108+x = 360

238+x = 360

x = 360-238

= 122

Answer 2

Answer:

D = 122⁰

Step-by-step explanation:

Let, A = 76⁰

B = 54⁰

C = 108⁰

D = x

A + B + C + D = 360 (Sum of the angle of the quadrilateral is 360⁰)

76⁰ + 54⁰ + 108⁰ + x⁰ = 360⁰

238⁰ + x⁰ = 360⁰

x⁰ = 360⁰ - 238⁰

x⁰ = 122⁰