Question

A=70° B=80° C=130° D=x find the value of x​

Answer 1

Given that :

• ∠A = 70°
• ∠B = 80°
• ∠C = 130°
• ∠D = x

Concept Used :

The sum of all the angles of a quadrilateral = 360°

B/c,

∠A + ∠B + ∠C + ∠D = 360°

70° + 80° + 130° + x = 360°

280° + x = 360°

x = 360° - 280°

x = 80°

Answer 2

Answer:

80°

Step-by-step explanation:

<A + <B + <C + <D = 360°

70° + 80° + 130° + <D = 360°

280° + <D = 360°

<D = 360° - 280°

<D = 80°