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In this section we will discuss rhombus and its theorems. |
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1) ABCD is a rhombus. | 1) Given |
2) AB = BC = CD = DA | 2) Properties of rhombus. |
3) OB = OD and OA = OC | 3) As Parallelogram is a rhombus so diagonal bisect each other. |
4) BO = OD | 4) From (3) |
5) BC = DC | 5) Properties of rhombus. |
6) OC = OC | 6) Reflexive (common side) |
7) ΔBOC ≅ ΔDOC | 7) SSS Postulate. |
8) ∠BOC = ≅ ∠DOC | 8) CPCTC |
9)∠BOC + ∠DOC = 180 | 9) Linear pair angles are supplementary. |
10) 2∠BOC = 180 | 10) Addition property |
11) ∠BOC = 90 | 11) Division property |
12) ∠BOC = ∠DOC = 90 | 12) As these two angles are congruent. |
Russia-Ukraine crisis update - 3rd Mar 2022
The UN General assembly voted at an emergency session to demand an immediate halt to Moscow's attack on Ukraine and withdrawal of Russian troops.