Mathematics, 24.09.2019 15:30 haileysolis5

Need .
complete the following proof.
given: abcd is rhombus
prove: ∠1 ≅∠2
statement reason
1. 1. given
2. ad = bc = cd = ba 2.
3. do = ob; ao = oc 3. diagonals of a parallelogram bisect each other.
4. △doc ≅△boa 4.
5. ∠1 ≅∠2 5.
complete the two-column proof by providing the missing statements or reasons above.

Need . complete the following proof. given: abcd is rhombus prove: ∠1 ≅∠

Answers: 2

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Answers

Answer from: madleneinejessup

(1) ABCD is rhombus. (2) All the sides of a rhombus are congruent. (3) SAS. (4) Diagonal of rhombus are perpendicular to each other.

Step-by-step explanation:

Given information : ABCD is rhombus.

Prove: ∠1 ≅∠2

According to the properties of rhombus, all the sides of a rhombus are congruent, therefore length of AD, BC, CD and BA are equal.

According to the properties of rhombus, diagonals of a rhombus bisect each other. So O is midpoint of AC and BD.

In triangle DOC and BOA,

DO=OB (Diagonals of a rhombus bisect each other)

AO=OC (Diagonals of a rhombus bisect each other)

$\angle DOC=\angle AOC$ (Vertically opposite angles are same)

SAS postulate states that the two triangles are congruent if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle.

By SAS postulate triangle DOC and BOA are congruent to each other.

$\triangle DOC\cong \triangle AOC$

Since diagonal of rhombus are perpendicular to each other, therefore

$\angle 1\cong \angle 2$

Statement Reason

1. ABCD is rhombus. 1. Given

2. AD = BC = CD = BA 2. All sides of a rhombus are

congruent.

3. DO = OB; AO = OC 3. Diagonals of a

rhombus bisect each other.

4. △DOC ≅△BOA 4. SAS

5. ∠1 ≅∠2 5. Diagonal of rhombus are

perpendicular to each other

Answer from: Quest

e) none of the above because the measure of angle cba is 101°

Find the measure of ∠cba. a) 25° b) 50° c) 75° d) 100° e) none of the above

Answer from: Quest

replace with 27 and simplify.

10 , 27 , 10 , 70 , 10 , 35 , 10 , 48

step-by-step explanation:

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Need .
complete the following proof.
given: abcd is rhombus
prove: ∠1 ≅∠2

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