Question

pls answer quadrilaterals class 9
wrong answers will be reported​

Answer 1

Answer:

Area of ΔABC = 36 cm²

Step-by-step explanation:

Given: X and Y are mid-points of AB and CD respectively. Also, area of rectangle BCYX = 36 cm².

⇒ AB=2BX=2AX and CD=2DY=2CY.--------------1

w.k.t., area of rectangle = length × breadth

⇒ Area of rectangle BCYX = BX × BC = 36 cm²--------------2

w.k.t., area of triangle,Δ = (Base × height) / 2

⇒ Area of ΔABC = (AB × BC) / 2

or Area of ΔABC = (2BX × BC) / 2                         {∵from equation 1}

or Area of ΔABC = BX × BC

or Area of ΔABC = 36 cm²                        {∵from equation 2}

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