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Viva Voce: Mid-point Theorem | Lab Manuals for Class 9 PDF Download

Q.1. What is the area of a triangle?

Area of triangle = 1/2 x base x height


Q.2. Name the different triangles on the basis of its angles.

Acute angled triangle, obtuse angled triangle and right angled triangle.


Q.3. In a triangle, the line drawn through the mid-point of one side is parallel to another side, what is the ratio of parallel line to the third side?

1:2


Q.4. In a ∆ABC, D, E, F are the mid-points of the sides BC, CA and AB respectively, and ∠BAC = 70°, what is the value of ∠EDF?

70°


Q.5. In a triangle, the line drawn through the mid-points of two sides, then what will be the relation between the line and the third side?

Line will be parallel to the third side.


Q.6. Is mid-point theorem applicable in any type of triangle?

Yes


Q.7. Name the different triangles on the basis of its sides.

Equilateral triangle, scalene triangle, isosceles triangle.


Q.8. State the mid-point theorem.

The line drawn through the mid-point of one side of a triangle and parallel to another side of the triangle, bisects the third side of the triangle.

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