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In DeltaABC, D, E and F are the midpoint...

In `DeltaABC, D, E and F` are the midpoints of sides AB, BC and CA respectively. Show that `DeltaABC` is divided into four congruent triangles, when the three midpoints are joined to each other. (ΔDEF is called medial triangle)

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NCERT TELUGU-QUADRILATERALS-EXERCISE
  1. In DeltaABC, D, E and F are the midpoints of sides AB, BC and CA respe...

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  2. State whether the statements are True or False. (i) Every parallelog...

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  3. State whether the statements are True or False. (ii) All parallelogr...

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  4. State whether the statements are True or False. (iii) All trapeziums...

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  5. State whether the statements are True or False. (iv) A square is a r...

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  6. State whether the statements are True or False. (v) Every rhombus is...

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  7. State whether the statements are True or False. (vi) All parallelogr...

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  8. Complete the following table by writing (YES) if the property holds fo...

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  9. ABCD is trapezium in which AB"||"CD. If AD =BC, show that angleA=angle...

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  10. The four angles of a quadrilateral is in the ratio of 1: 2:3:4. Find t...

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  11. ABCD is a rectangle AC is diagonal. Find the nature of DeltaACD. Give ...

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  12. In the adjacent figure ABCD is a parallelogram ABEF is a rectangle sho...

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  13. Show that the diagonals of a rhombus divide it into four congruent tri...

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  14. If a quadrilateral ABCD, the bisector of angleC angleD intersect at O....

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  15. The opposite angles of a parallelogram are (3x-2)^@ and (x+48)^@. Find...

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  16. Find the measure of all the angles of a parallelogram, if one angle is...

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  17. In the adjacent figure ABCD is a parallelogram and E is the midpoint o...

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  18. In the adjacent figure a parallelogram and P, Q are the midpoints of s...

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  19. ABC is an isosceles triangle in which AB = AC. AD bisects exterior ang...

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  20. ABC is an isosceles triangle in which AB = AC. AD bisects exterior ang...

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  21. ABCD is a parallelogram and AP and CQ are perpendicular from vertices ...

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