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Geometry please need help I don’t know to do this try to help me please!!!!

Geometry please need help I don’t know to do this try to help me please!!!!-example-1

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Explanation:

Note that since
\triangle ABC \cong \triangle DEF, we can see from the figure that
\angle B and
\angle E have the same measure.

a) To solve for the length of
\overline{AB}, we write


3x + 6 = 4x \Rightarrow x = 6

b) Since the two triangles are congruent, we can say that
\angle A = \angle D so we can write


6y + 12 = 8y + 2

Solving for y, we get


2y = 10 \:\Rightarrow \:y = 5

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