Question

plz answer the followings​

Answer 1

Answer:

1) ang a + ang b +ang c = 180

90 + a + 65 = 180

155+a=180

a=180-155

a=25

Answer 2

Answer:

Step-by-step explanation:

value of a°  = 65°+90°+a°= 180°  ( sum of all angles of a triangle is 180°)

155+a°=180°

a°= 180°-155°

a° = 25°

answer 2 =  it's an isosceles triangle therefore

               ∠ A +∠B+∠C = 180°

               ∠A = ∠B   ( sides opposite to equal sides are equal )

                      ∠A+∠B°+∠B° = 180

                         ∠A+2∠B = 180

                         52 + 2∠B = 180

                         2∠B = 180-52

                     2∠B = 128

                ∠B = 128/2

                     ∠B = 64°