Question

The measure of. two angles of a ∆ are 40° and 50° then the third angle is ​

Answer 1

Answer:

we know that sum of all interior angles of a triangle is 180°

let the third angle be ∠x

so,40 + 50 + x = 180°

x + 90 = 180

x = 180-90

x = 90°

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Answer 2

Answer:

let the third angle be x

∴ 40 + 50 + x = 180

90 + x = 180

x= 180 - 90

x = 90 ans.

Step-by-step explanation: