Question

(b) In an isosceles triangle, the base angles are equal. The vertex angle is 40°.
What are the base angles of the triangle? (Remember, the sum of three angles of
a triangle is 1809).
fell two shor​

Answer 1

Answer:

let the base angle is x

sum of interior angle of triangle is 180

x+x+40=180

2x+40=180

2x=180-40

2x=140

x=140/2=70

so the base angle of triangle is 70,70

Answer 2

Answer:

THUS BASE ANGLES ∠B=∠C=70°

Step-by-step explanation:

As in the figure

∠B=∠C=x  

and ∠A=40°

∠A+∠B+∠C=180°

40+X+X=180°

2X=140

X=140/2=70°

THUS BASE ANGLES ∠B=∠C=70°