The ratio of the measure of a base angle in an isosceles triangle to the measure of the vertex angle is 1: 7

Assuming you require the measure of the angles

let x represent each equal  base angle then vertex = 7x

The sum of the angles in a triangle = 180°, hence

x + x + 7x = 180

9x = 180 ( divide both sides by 9 )

x = 20

the base angles = 20° and the vertex = 140°

(-1,-0.5)

step-by-step explanation:

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step-by-step explanation: