Answer:
Area of the quadrilateral ABCD = Area of the triangle ABC + Area of the triangle ADC \[\text{= }\frac{\text{1}}{\text{2}}\text{(base }\!\!\times\!\!\text{ height) + }\frac{\text{1}}{\text{2}}\text{(base }\!\!\times\!\!\text{ height)}\] \[=\frac{1}{2}(22\times 3\text{) c}{{\text{m}}^{\text{2}}}+\frac{1}{2}(22\times 3\text{) c}{{\text{m}}^{\text{2}}}\] \[\text{= 33 c}{{\text{m}}^{\text{2}}}\text{+ 33 c}{{\text{m}}^{\text{2}}}\text{= 66 c}{{\text{m}}^{\text{2}}}\]
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