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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
9.31 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:

  1. 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 (361/19) cm and (256/16) cm. Find its area.
80 sq cm
48 sq cm
152 sq cm
46 sq cm

Q 2: The diagonals of a rhombus are a units and b units. Find its area.
b sq units
a sq units
ab sq units
(ab/2) sq units

Q 3: 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.
7x units
5x units
25x units
10x units

Q 4: One of the diagonals of a rhombus is 10 cm. Find the length of the other diagonal if its area is given by 60 sq cm.
12 cm
9.5 cm
6 cm
10.5 cm

Q 5: The diagonals of a rhombus are (133/12) cm and (124/5) cm. Find its area.
256.13 sq cm
274.87 sq cm
200.03 sq cm
132.05 sq cm

Q 6: 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 cm
9 cm
6 cm
12 cm

Question 7: This question is available to subscribers only!

Question 8: This question is available to subscribers only!


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