Question

if two angle of a triangle are 21 degree and 19 degree find the third angle​

Answer 1

Answer:

x=140°

Step-by-step explanation:

Angle sum property=Sum of all angle of triangle is equal to 180

Let the angle be x

∴21+19+x=180

40+x=180

⇒x=180-40

⇒x=140°

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