Question

Use graph paper for this question (Take 2 cm = 1 unit along both x and y axis). ABCD is a quadrilateral whose vertices are A(2, 2), B(2, -2), C(0, -1) and D (0,1). 

(i) Reflect quadrilateral ABCD on the y-axis and name it as A’B’CD. 

(ii) Write down the coordinates of A’ and B’. 

(iii) Name two points which are invariant under the above reflection. (iv) Name the polygon A’B’CD.

Answer 1

Scale used is : 2 cm = 1 unit along both x and y axis. 

(i) Here, vertices of the quadrilateral ABCD are A(2, 2), B(2, -2), C(0, -1) and D(0, 1)

(ii) Coordinates of A' and B' are A'(-2,2) and B'(-2,-2)

(iii) Two points which are invariant are C and D. 

(iv) A’B’CD is a trapezium.