Question

some isosceles triangles are drawn below. in each, one angle is given. find the other angles. ​

Answer 1

Answer:

Isosceles Triangle= a triangle with 2 equal sides

therefore one other angle is = given angle

1) 30°+30°+x=180(sum of all interior angles of a triangle)

60+x=180

x=180-60=120°

2) 40+40+x=180°

80+x=180

x=180-80=100°

3) 20+20+x=180^

40+x=180

x=180-40=140°

4) in here,we know sum of all interior angles of a triangle is 180°,but we can't use 100+100+x,as it's value will be higher than 200

So, It's not an equal angle

Let those equal angles be x

100+x+x=180°

100+2x=180°

2x=180-100=80°

x=80/2=40°

Answer 2

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