Answer:

∠A = 100°, ∠B = 105°, ∠C = 70°, a∠D = 90°

Step-by-step explanation:

Given ,

The angles of a quadrilateral ABCD are

Let ∠A = 100°  ∠B = 105°  ∠C = 70°  ∠D = ?

In a quadrilateral ∠A+∠B+∠C+∠D = 360°

Let the 4'th angle be 'x'

⇒ 100 + 105 + 70 + x = 360°

⇒ 275 + x = 360

⇒ x = 360 - 275 = 90°

So , the angles of the quadrilateral is

• ∠A = 100°
• ∠B = 105°
• ∠C = 70°
• ∠D = 90°