Page 192 - Math Genius C4

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\\September 30, 2025 9:51 AM Bharat Arora P-9 Reader _________________________ Date: ___________________74

3. A polygon has 6 equal sides. Each side is
4 cm in length. Find its perimeter. Challenge Question

4. Find the perimeter of a triangle whose two A five-sided shape has a
sides are equal in length, each measuring perimeter of 76 cm. Three
15 cm and the third side is 18 cm. of its sides measure 12 cm, Critical Thinking
11 cm and 15 cm. What are
5. Find the perimeter of a rectangle whose the possible measurements

length is 48 cm and breadth is 32 cm. of the remaining sides?
6. Find the perimeter of a square whose side

is 7 cm.

area

Riya and Siya are participating in a drawing competition. Both of them have a drawing
sheet and they want to compare to find out whose sheet offers more space for drawing.

Sheet 1 Sheet 2

To know whose sheet offers more space, they put a square grid to measure the
surfaces of the sheets as shown below.
1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit
1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit unit unit unit unit unit unit unit

1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit unit unit unit unit unit unit unit
1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit unit unit unit unit unit unit unit
1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit unit unit unit unit unit unit unit
28 square units 1 sq. 1 sq. 1 sq. 1 sq.
unit unit unit unit
24 square units

Clearly, sheet 1 has 28 unit squares and sheet 2 has 24 unit squares. Since sheet 1 has
more unit squares than sheet 2, sheet 1 has more space than sheet 2 for drawing.

Thus, we can say that sheet 1 has a larger area than sheet 2.

190 Mathematics-4