Question
Calculate the value of in each of the following figures.
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Text solutionVerified
We know that the sum of all the angles in triangle is .
By substituting the values in the above equation
On further calculation
By subtraction
From the figure we know that and are vertically opposite angles
So we get
We know that the sum of all the angles in triangle is .
By substituting the values
On further calculation
By subtraction
.
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Question 1
Using Theorem 6.2, prove that the line joining the mid-points of any two sides of a triangle is parallel to the third side. (Recall that you have done it in Class IX).Theorem 6.2: If a line divides any two sides of a
triangle in the same ratio, then the line is parallel
to the third side.
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Question Text | Calculate the value of in each of the following figures. |
Answer Type | Text solution:1 |
Upvotes | 150 |