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1. Find the area of the trapezium whose parallel sides are 22 cm and 31 cm respectively, and the distance between them is 12 cm.2. The area of a trapezium is 320 sq.cm and distance between the parallel sides is 20 cm.if one of the parallel sides is 16 cm,find the length of another parallel side.3. Find the area of a rhombus if:a) Each side is 16 m and height is 9 mb) Each diagonals are 20 cm and 18 cm.4. The area of a rhombus is 256 sq.cm and one of the diagonals is 32 cm.find the length of other diagonal.5. The area of a triangle with a base of 8 cm is 24 sq.cm.find its altitude from this base.6. Find the lateral surface area,total surface area and volume of a cube of:a) Side=70cm b)side=25cm |
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Answer» 1. Area of trap = sum of parallel SIDES × height = 22+31 ×12 = 394 2. Again , Area = Sum of parallel sides × height = > 320 = (16+x) × 20 320/20 = 16+x 16 - 16 = x x = 1cm 3. (a) Area of RHOMBUS = b × h = 16×9 = 144 (b) Area = 1/2 d1 d2 = 1/2 × 20 × 18 = 180 4. 256= 1/2*32*x x = 16 5. area = 1/2*b*h 24= 1/2*8*x x=6cm Hope it helps you buddy :)
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