Question

If three angle of quadrilateral are 90 degree,85 and 70 degree ,then the fourth angle will be?

Answer 1

Answer:

120°

Step-by-step explanation:

Given, ∠A = 75°, ∠B = 90° and ∠C = 75°

We know that, sum of all the 1 angles of a quadrilateral is 360°.

∠A+ ∠B + ∠C + ∠D = 360°

⇒ 75° + 90°+ 75°+ ∠D = 360°

∠D = 360° – (75° + 90° + 75°)

= 360° -240° = 120°

Hence, the fourth angle of a quadrilateral is 120°.

Answer 2

We know that, sum of all the 1 angles of a quadrilateral is 360°.

90 + 85 + 70 +x = 360

x = 360 - 245

x = 115°

hence , the fourth angle is 115°

thanks...hope that this helps u.. please mark me as brainliest..stay home n stay safe