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Answer:
4. 30 cm
5. 6 cm
6. 4 cm
Step-by-step explanation:
4. Area of a trapezium = 400 cm²
Distance between the parallel sides = 16 cm
One of the parallel sides = 20 cm
Other side. = x
w.k.t.,
Area of Trapezium = ½ × height×(sum of Parallel sides)
½×16×{20+ x} = 400
8(20+x) = 400
20 + x = 50
x = 30 cm
5. Diagonal of a quadrilateral = 4 cm
Heights of the quadrilateral (h and m) = 1 cm and 2 cm
Area of Quadrilateral = ½d(h+m)
= ½×4×(3)
Area of Quadrilateral = 6 cm
6. Area of Trapezium = 40 cm²
Sum of two parallel sides = 20 cm
w.k.t.,
Area of Trapezium = ½× h ×20 = 40
10h = 40
÷ h
h = 4 cm