English

The mid-points of the sides of a triangle ABC along with any of the vertices as the fourth point make a parallelogram of area equal to ______.

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Question

The mid-points of the sides of a triangle ABC along with any of the vertices as the fourth point make a parallelogram of area equal to ______.

Options

  • `1/2` ar (ABC)

  • `1/3` ar (ABC)
  • `1/4` ar (ABC)
  • ar (ABC)
MCQ
Fill in the Blanks
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Solution

The mid-points of the sides of a triangle ABC along with any of the vertices as the fourth point make a parallelogram of area equal to `underlinebb(1/2 ar  (ABC))`.

Explanation:

Given: ABCD is a triangle.

Mid points of the sides of ΔABC with any of the vertices forms a parallelogram.

To find: Area of the parallelogram

Calculation: We know that, Area of a parallelogram = base × height


Hence area of || gm DECF = EC × EG

area of || gm DECF = EC × EG

area of || gm DECF = `1/2 BC xx 1/2 AE`  ...(E is the midpoint of BC)

area of || gm DECF = `1/2(1/2BC xx AE)`

area of || gm DECF = `1/2(ar ( ΔABC) ` 

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Chapter 14: Areas of Parallelograms and Triangles - Exercise 14.5 [Page 62]

APPEARS IN

R.D. Sharma Mathematics [English] Class 9
Chapter 14 Areas of Parallelograms and Triangles
Exercise 14.5 | Q 19 | Page 62
NCERT Exemplar Mathematics Exemplar [English] Class 9
Chapter 9 Areas of Parallelograms & Triangles
Exercise 9.1 | Q 6. | Page 87

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