CBSE 8th Maths:Construction of quadrilateral (Ch:Practical Geometry)
Point to Remember
1. .Five measurement can determine a quadrilateral uniquely.
2. A quadrilateral can be constructed uniquely if
Ans: 5
2. How many measurements can determine a square?
Ans: 1
3. How many measurements can determine a parallelogram uniquely?
Ans: 3
4. How many measurement can determine a rhombus?
Ans: 2
5. Which property is used to construct a parallelogram. If its one side and two diagonals are given.
Ans: Diagonals are bisects to each other.
6. What property is used to construct a rhombus. If its two diagonals are given.
Ans: Diagonals of a rhombus bisect each other at right angle.
Q.1. Construct a quadrilateral BDEF where DE = 4.5 cm, EF = 3.5cm, FB = 6.5cm, <F = 50 and <E = 100.
For more study
Construction of quadrilateral Practice Questions (View/Read/Download)
Construction of quadrilateral CBSE Test Paper (View/Read/Download)
Construction of quadrilateral CBSE Test Paper (View/Read/Download)
Point to Remember
1. .Five measurement can determine a quadrilateral uniquely.
2. A quadrilateral can be constructed uniquely if
 Its four sides and one diagonal is given.
 Its two adjacent sides and three angles are known.
 Its three sides and two included angles are given.
 Its other special properties are known (rectangle, square, rhombus, parallelogram).
 Its three sides and two diagonals given.
Ans: 5
2. How many measurements can determine a square?
Ans: 1
3. How many measurements can determine a parallelogram uniquely?
Ans: 3
4. How many measurement can determine a rhombus?
Ans: 2
5. Which property is used to construct a parallelogram. If its one side and two diagonals are given.
Ans: Diagonals are bisects to each other.
6. What property is used to construct a rhombus. If its two diagonals are given.
Ans: Diagonals of a rhombus bisect each other at right angle.
Q.1. Construct a quadrilateral BDEF where DE = 4.5 cm, EF = 3.5cm, FB = 6.5cm, <F = 50 and <E = 100.
For more study
Construction of quadrilateral Practice Questions (View/Read/Download)
Construction of quadrilateral CBSE Test Paper (View/Read/Download)
Construction of quadrilateral CBSE Test Paper (View/Read/Download)
Construct a parallelogram ABCD in which AB=6.5 AC=3.8 and the altitude AL from A is 2.5cm draw an altitude from C
[ Hint : Follow the given steps to construct the parallelogram ABCD. Step 1. Draw AB = 6.5 cm. Step 2. At A, draw AE ⊥ AB. With A as centre and radius 2.5 cm, mark an arc which intersects AE in F. Step 3. Draw a line parallel to AB and passing through F. Step 4. With A as centre and radius 3.4 cm, mark an arc which intersects the line parallel to AB in C. Step 5. With C as centre and radius 6.5 cm, mark an arc which intersects the line CF in D. (Opposite sides of parallelogram are equal) Step 6. Join BC and DA. Thus, ABCD is the required parallelogram. 

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