If an isosceles triangle one of the base angle is 65. find the vertical angle.
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Given:In isosceles triangle ABCwe have base angle=65
To find:/_A
Sol:In triangle ABC
/_B=/_C(Therom)
Therefore,
/_C=/_B=65
/_A+/_B+/_C=360(Angle Sum Property)
/_A+65+65=180
/_A+130=180
/_A=180-130
/_A=50
To find:/_A
Sol:In triangle ABC
/_B=/_C(Therom)
Therefore,
/_C=/_B=65
/_A+/_B+/_C=360(Angle Sum Property)
/_A+65+65=180
/_A+130=180
/_A=180-130
/_A=50
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