Mental Math on Perimeter and Area
In mental math on perimeter and area we will solve different type of problems on perimeter of a triangle, perimeter of a square and a rectangle, area of a rectangle, area of a square and word problems on area.
1. Area of a square of side 1 cm 4 mm = __________ sq mm.
2. Area of a square of side 1 cm = __________
3. Area of a rectangle of dimensions 1 m and 4 m is __________ sq. m.
4. Area of a rectangle = __________ × __________
5. Area of square = __________
6. Find the area of the rectangle whose length and breadth are 10 cm and 5 cm respectively. _____
7. Find the area of a square whose perimeter is 8 cm. _____
8. If ℓ = 25 cm, b = 15 cm, perimeter = _____ cm
Answer:
1. 196
2. 1 sq. cm
3. 4
4. Length × Breadth
5. side × side
6. 50 sq. cm
7. 4 sq. cm
8. 80 cm
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4th Grade Math Activities
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