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### Grade 7 - Mathematics9.31 Area of Rhombus - I

 Example: The diagonals of a rhombus are 18 cm and 16 cm. Find its area. Solution: Given that, d1 = 18 cm and d2 = 16 cm. Area of a rhombus (A) = 1/2 * d1 * d2. A = 1/2 * 18 * 16 A = 9 * 16 A = 144 sq cm. Directions: Read the above example carefully and answer the following questions: Draw 10 different rhombus and label its sides. Draw the diagonals and measure the lengths. Also find their areas.
 Q 1: The diagonals of a rhombus are 15 cm and 18 cm. Find its area.130 sq cm125 sq cm135 sq cm145 sq cm Q 2: One of the diagonals of a rhombus is 5x units. Find the length of the other diagonal if its area is given by 25x2 sq units.10x units7x units5x units25x units Q 3: The diagonals of a rhombus are a units and b units. Find its area.ab sq units(ab/2) sq unitsa sq unitsb sq units Q 4: The diagonals of a rhombus are (361/19) cm and (256/16) cm. Find its area.80 sq cm152 sq cm48 sq cm46 sq cm Q 5: One of the diagonals of a rhombus is 12 cm. Find the length of the other diagonal if its area is given by 66 sq cm.11 cm12 cm9 cm6 cm Q 6: The diagonals of a rhombus are (133/12) cm and (124/5) cm. Find its area.132.05 sq cm274.87 sq cm200.03 sq cm256.13 sq cm Question 7: This question is available to subscribers only! Question 8: This question is available to subscribers only!