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What is the measure of ZABD? What is the reason?60° , isosceles triangle theorem48°, equilateral triangle theoremCO 48°, isosceles triangle theorem60° , equilateral triangle theoremB66°DA

What is the measure of ZABD What is the reason60 isosceles triangle theorem48 equilateral triangle theoremCO 48 isosceles triangle theorem60 equilateral triangl class=

Respuesta :

Consider the traingle ABD,

The side AB and A are equal means that angle A is equal to angle D.

Determine the angle B of traingle ABD by using angle sum property of triangle.

[tex]\begin{gathered} \angle A+\angle B+\angle D=180^{\circ} \\ 66^{\circ}+66^{\circ}+\angle B=180^{\circ} \\ \angle D=48^{\circ} \end{gathered}[/tex]

So angle D is of 48 degree and two sides are equal so isoceles traingle theorem is used for angle measurement. Option C is correct.

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