Perimeter of rectangles, regular and irregular shapes, properties of area
Answers are for parents and teachers.
1
A rectangle has sides 25 cm and 13 cm. Find its perimeter (cm).
76
2
A regular 12-gon has side 7 m. Find its perimeter.
84
3
A rectangle has perimeter 84 m and one side 30 m. How long is the other side, in metres?
12
4
How many dm² is 4 m²?
400
5
A yard is 30 m × 20 m and contains a 12 m × 5 m garden. What is the area outside the garden, in m²?
540