Area of Parallelograms and Triangles 7.1-7.2

Perimeter

100

The perimeter of a rectangle with length 8cm and width 4cm.

24cm

200

Perimeter of triangle with side lengths 3m, 5m and 7m. 

15m

300

Perimeter of parallelogram with length 8mm and width 5mm. 

26mm

400

Perimeter of square with side of 9cm.

36cm

500

Perimeter of rectangle with length of 5cm and width of 30mm.

16cm or 160mm

Area - Rectangle

100

Area of rectangle formula

A = l x w

200

Rectangle with length of 6cm and width 4cm.

24cm²

300

Area of rectangle with length 9m and width of 2m.

18m²

400

A rectangle has an area of 72in².  The width is half of the length.  What are the dimensions of the length and the width? 

Length = 12in

Width = 6in 

500

Rectangle has an area of 27cm².  The length is 3 times longer than the width.  What is the perimeter of the rectangle?  

Length is 9cm; Width is 3cm.  

Perimeter is 24cm.

Area - Triangle

100

Area of triangle formula

A = (b x h) / 2        OR 

A = 1/2 x b x h 

200

Area of triangle with base 11cm and height 8cm.

44cm²

300

Area of triangle with base 3m and height 2m.

3m²

400

Area of triangle with base 10cm and height of 46mm.

23cm²  

2300mm²

500

A triangular flag with base of 4m and height of 3m is to be made.  What area of fabric is required to make the flag?

6m²

Area - Parallelogram

100

Area of parallelogram formula

A = b x h

200

Area of parallelogram with base 6cm and height 8cm.

48cm²

300

Area of parallelogram with base of 12m and height of 9m.

108m²

400

Area of parallelogram with base 4000m and height 5km.

4 km x 5 km = 20km²

4000m x 5000m = 20,000,000m²

500

Area of a parallelogram is 18cm².  What base and height could this shape have? (Hint there is more than one correct answer)

1cm & 18cm

2cm & 9cm 

3cm & 6cm 

Convert Units

100

1 cm = _________mm

10

200

4.5km = ________m

4500

300

8.9m = ____________cm

890

400

4mm = _________cm

0.4

500

12.5km = ________ cm

1 250 000