Question

the base angle of an isosceles triangle is 55 degree the size of the vertical angle is
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Answer 1

Answer:

70°

Step-by-step explanation:

In a isosceles triangle 2 sides are equal...

angles opposite to equal sides are also equal..

therefore if one of the base angle is 55 the other base angle is also 55

therefore the other angle is

55+55+x=180

angle sum property

110+x=180

x=180-110

x =70°