Question

(a) 40°
For each of the following the given angle is the
base angle of an isosceles triangle. Find the third
angle of the triangle.​

Answer 1

Answer:

70°

Step-by-step explanation:

by angle sum property,

angle1 + angle2 + angle3 = 180°

in an isosceles triangle, measure of 2 angles are equal

angle1 = 40° (given)

angle2=angle3

using angle1 + angle2 + angle3 = 180°

40° + 2*angle2 = 180°

2* angle2 = 140°

angle2= 70°

the other 2 angles will be 70° each

Hope the answer is helpful