Area and Perimeter of 2D Shapes

PERIMETER and AREA

LEARNING GOAL: TO CALCULATE PERIMETER AND AREAS OF PARALLELOGRAMS AND TRIANGLES

​PERIMETER REVIEW

​The perimeter is the distance around a shape.

Multiple Choice

What is the perimeter?

• 54 cm

• 29 cm

• 30 cm

• 15 cm

Multiple Choice

What is the perimeter of this heptagon?

• 64 m

• 63 m

• 56 m

• 57 m

Multiple Choice

What is the perimeter of this parallelogram?

• 19 cm

• 10 cm

• 24 cm

• 20 cm

Multiple Choice

What is the perimeter?

• 20

• 5

• 4

Multiple Choice

What is the perimeter of this shape?

• 45 cm

• 98 cm

• 49 cm

• 56 cm

Multiple Choice

What is the perimeter of this pentagon?

• 15 m

• 20 m

• 25 m

• 30 m

Multiple Choice

What is the perimeter of this shape?

• 4 m

• 12 m

• 20 m

• 24 m

Multiple Choice

What is the perimeter of the fence?

• 25

• 30

• 35

• 40

​AREAS OF PARALLELOGRAMS AND TRIANGLES

​PARALLELOGRAMS

​A parallelogram is a quadrilateral whose opposite sides are parallel and equal in length.

​PARALLELOGRAMS

The area of a parallelogram is:

base x perpendicular height

A = b x h

​TRIANGLES

​A triangle is a 2D shape with three sides.

​TRIANGLES

The area of a triangle is:

1/2 x base x perpendicular height

A = b x h

2

Multiple Choice

What is the perimeter?

• 20

• 40

• 50

• 60

Multiple Choice

Area of triangle?

• 20 cm²

• 56 cm²

• 28 cm²

• 27 cm²

Multiple Choice

Find the area of a triangle with a height of 4 mm and a base of 6 mm?

• 5 mm squared

• 6 mm squared

• 12 mm squared

• 24 mm squared

Multiple Choice

What is the area?

• 12 cm²

• 14

• 14 cm²

• 24 cm²

Multiple Choice

Which measurement is best for determining the distance walking around the edge of a park?

• area

• perimeter

​COMPOSITE shapes are made up from more than one shape

​Sometimes you need to add areas together.

​Sometimes you need to add subtract one area from another.

Multiple Choice

SOMETIMES YOU HAVE TO WORK OUT THE PARTS YOURSELF.

What is the Area of this shape?

(HINT add the rectangle and triangle)

• 56 cm²

• 50 cm²

• 78 cm²

• I have no idea how to do this. I need to come to maths zone