Question

18. What will be the measure of third angle of a triangle if other two angles
measure 40° and 55° respectively.​

Answer 1

Answer :

let the third angle be x°

we know that

the sum of all angles of a triangle = 180°

so, 40°+55°+x° = 180°

95 +x = 180°

x = 180°–95° = 85°