Area & Perimeter (Cambridge O Level Maths)

A rectangle measures 8.5 cm by 10.7 cm, both correct to 1 decimal place.

Calculate the upper bound of the perimeter of the rectangle.

 ............................................ cm

The diagram shows a right-angled triangle.

Calculate the perimeter.

............................................ cm

The sides of a square are 15.1 cm, correct to 1 decimal place.

Find the upper bound of the area of the square.

............................................. cm²

The area of a square is 42.5 cm², correct to the nearest 0.5 cm².
 
Calculate the lower bound of the length of the side of the square.
 

 .......................................... cm

ABDF is a parallelogram and BCDE  is a straight line.
AF = 12cm, AB = 9 cm, angle CFD = 40° and angle FDE = 80°.

 .......................................... cm² [3]

The sides of an isosceles triangle are measured correct to the nearest millimetre.
One side has a length of 8.2 cm and another has a length of 9.4 cm.

Find the largest possible value of the perimeter of this triangle.

............................................ cm

Find the area of a regular hexagon with side length 7.4 cm.

.......................................... cm²

The diagram shows a shaded region formed by removing an equilateral trianglefrom a regular hexagon .

The points and lie on such that .

Given that the area of region is work out the length of .

......................................................