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Given: ▱ABZY; AY¯≅BX¯;

Prove: ∠1≅∠2and ∠1≅∠3.

Short Answer

Expert verified

∠1≅∠2and ∠1≅∠3

Step by step solution

01

Step 1. Consider the diagram.

Parallelogram ABZY is:

Here, AY¯≅BX¯.

02

Step 2. State the proof.

In ΔAYZand ΔABZ,

Statement

Reason

ZB≅AB

The sides of a rhombus are equal.

∠1≅∠3 …… (1)

Angles opposite to equal sides are equal.

AY∥BZ

The opposite sides of a rhombus are parallel and transversal AZ.

∠1≅∠4 …… (2)

Alternate angles.

From (1) and (2),

∠2≅∠1

Thus, ∠1≅∠2and ∠1≅∠3.

03

Step 3. State the conclusion.

Therefore, ∠1≅∠2and ∠1≅∠3 (proved).

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