Use the graph paper for this question. ( Take 2cm = 1unit along both the axis)Plot the
points O(0,0), A(-4,4), B(-3,0) and C(0,-3).
i) Reflect the points A and B on the Y-axis and name them A’ and B’respectively. Write down
their coordinates.
ii) Name the figure OABCB’A’.
iii) State the line of symmetry of the figure.
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Step-by-step explanation:
Area of the figure =
Area of ΔABO + ΔA'B'O + ΔBB'C
Area of ΔABO = 1/2 × base × height
= 1/2 × 3 × 4
= 6 unit^2
Area of ΔA'B'O = 6 unit^2 (both ΔABO and ΔA'B'O are equal)
Area of ΔBB'C = 1/2 × base × height
= 1/2 × 6 × 3
= 9 unit^2
Area of the figure = 9+ 6 + 6
= 21 unit^2
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