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The vertical angle of an isosceles tringle is 100° find the base |
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Answer» 40Explanation:We know that an isosceles triangle has TWO sides of the same LENGTH and one side of different length.The SUM of the measures of the angles of the triangle is 180°.We know the vertical angle of the triangle i.e., 100°.Let the base angles be x and x since they have the same value.So we get,x+x+100=180° (by condition)2x+100=180°2x= 180-1002x=80x=80/2x=40°So the MEASURE of both the base angles are x i.e., 40°. |
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