Secondary School (English Medium) (5 to 8) इयत्ता ८ - CBSE Question Bank Solutions

Take suitable number of cards given in the adjoining diagram [G(x × x) representing x², R(x × 1) representing x and Y(1 × 1) representing 1] to factorise the following expressions, by arranging the cards in the form of rectangles: x² + 4x + 4. Factorise 2x² + 6x + 4 by using the figure.

Calculate the area of figure.

In the trapezium ABCD, the measure of ∠D is ______.

If two adjacent angles of a parallelogram are in the ratio 2 : 3, then the measure of angles are ______.

Two adjacent angles of a parallelogram are in the ratio 1:5. Then all the angles of the parallelogram are ______.

Adjacent angles of a parallelogram are ______.

Two adjacent angles of a parallelogram are in the ratio 1:3. Find its angles.

The adjacent angles of a parallelogram are (2x – 4)° and (3x – 1)°. Find the measures of all angles of the parallelogram.

In parallelogram ABCD, find ∠B, ∠C and ∠D.

Draw a circle of radius 3 cm and draw its diameter and label it as AC. Construct its perpendicular bisector and let it intersect the circle at B and D. What type of quadrilateral is ABCD? Justify your answer.

Square of 3x – 4y is ______.

a² – b² is equal to ______.

Square of 9x – 7xy is ______.

(a – b) ______ = a² – 2ab + b² 

(a – b)² + ______ = a² – b² 

Factorised form of 4y² – 12y + 9 is ______.

103² – 102² = ______ × (103 – 102) = ______.

(a – b)² = a² – b² 

Using suitable identities, evaluate the following.

(9.9)² 

Factorise the following, using the identity a² – 2ab + b² = (a – b)².

x² – 8x + 16