Question

If two of the angles of a triangle are 30° and 70°,the third angle measures: *
a)70°
b)50 degree
c)80 degree
d) 90°

Answer 1

Answer:

c) 80°

Step-by-step explanation:

Answer 2

Answer:

the correct answer is  'c' 80° or 80 degree

Step-by-step explanation:

  given that two angles of the triangle are  30° and 70°

  let  a b c are be the angles of the triangle  

  in a triangle the sum of the 3 angles = 180°

  ∴  a = 30° , b = 70°  , need to find out c

  in triangle sum of the 3 angles = 180°

                        ∴  a+ b + c = 180°

                          30° + 70° + c = 180

                          100° + c =180  

                          c = 180° -100°

                           c = 80°