Theorem: In a triangle the greater angle has the longer side opposite to it. Given: A in which To Prove: . Proof: In , we have the following three possibilities. . Out of these three possibilities exactly one must be true. |
Case I: When AC = AB
As AC = AB [Angles opp. to equal sides are equal]
But as is given it contradicts our assumption.
CASE II: When
[ Longer side has the greatest angle opposite to it]
This also contradicts the given statement.
Thus, we are left with the only possibility, , which must be true.
Hence, .
In the following figure, AB and CD are respectively the smallest and longest sides of a quadrilateral ABCD. Then the relation between the is | |||
Right Option : A | |||
View Explanation |
In the following figure, PQRS is a quadrilateral. PQ is the longest side and RS is its shortest side. Then the relation between and is ______________ . | |||
Right Option : C | |||
View Explanation |
Fill in the blank to make the following statement true. If two angles of a triangle are unequal, then the smaller angle has the _____________________ side opposite to it. | |||
Right Option : C | |||
View Explanation |
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