Question

if the base angle of an issoceles triangle is 40 degree . Then the third angle is equal to 90 degree true or false​

Answer 1

Answer:

false

Step-by-step explanation:

fact that triangle has 180 degrees

isosceles triangle has 2 equal angles, so if 40 degree is the set of equal angles,

40+40=80

remaining angle:

180-80=100, therefore 90 degrees cant be the 3rd angle