# 8.4.2. Isosceles Triangles

In , if and , find .

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Determine the vertex angle of the isosceles triangle, given that the measure of one of its base angles is .

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Find .

• A84
• B96
• C60
• D42
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Given that is an isosceles triangle, where , determine the measures of and .

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• D,
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Find .

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In the figure below, given that , , and , determine .

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In the figure below, and , find .

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Find .

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In the figure below, given that , , and , find .

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In the figure below, is an equilateral triangle, , and . Find .

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Find .

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Given that is a parallelogram, find .

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Find the value of in the figure below.

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Find .

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Find the value of .

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Find the value of .

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