Question

two angle of a triangle are 30° and 80° then the value of third angle is
a)90°
b)50°
c)110°
d)70°​

Answer 1

Answer:

We know that sum of all interior angles of a triangle are supplementary

that is their sum is always 180°

let the unknown angle be x

therefore

x+30+80=180

x+110=180°

x=180-110

x=70°

therefore option d)70° is the correct answer

hope it helps

Answer 2

Answer:

d) 70°

Step-by-step explanation:

180 - 30 - 80 = 180 - 110 = 70°

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