Page 238 - MathGPT_V1.0_C5

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Thus, Area of the irregular closed figure = Number of complete squares (m) +
1
Number of squares having more than half parts enclosed (n) + × Number of

squares having half parts enclosed (p). 2
1
= 55 × 1 sq. units + 8 sq. units + × 5 sq. units
2
= 55 sq. units + 8 sq. units + 2.5 sq. units

= 65.5 sq. units.

1
Generally, area of the irregular closed figure = (m + n + p) sq. units.
2
We use this method to find the area of irregular figures.

maths fun

Take a squared paper of 1 cm × 1 cm unit squares and trace your palm on it.
Calculate the area enclosed by your hand.

Practice Time 12C

Estimate the area of the following irregular figures. Take area of 1 square = 1 sq. cm.

1. 2. 3.

4. 5. 6.

236 Mathematics-5