Perimeter and Area

Question 1

What is the Perimeter of a shape?

Answer 1

Perimeter is the total length of the sides of a 2D shape. It is measured in cm or any other form of measurement.

Question 2

What is the area of a shape?

Answer 2

Area is the amount of space taken up by a 2D shape or surface. It is measured in cm² or any other form of measurement²

Question 3

How do you find the area of a Rectangle?

Answer 3

Rectangle area is the length multiplied by the width.

Rectangle area = L x W

Question 4

How do you find the area of a Triangle?

Answer 4

The area of a triangle is the base multiplied by the height divided by 2. This is because if you put two identical triangles together they will form a rectangle.
Triangle area = (b x h) / 2

Question 5

How do you find the area of a Parallelogram?

Answer 5

The area of a Parallelogram is the base multiplied by the height. This is because if you take the overhang of parallelogram on one side and put it on the other side you make a rectangle.
Area of Parallelogram = b x h

Question 6

How do you find the area of a trapezium?

Answer 6

The are of a Trapezium is length of the top and bottom sides added together multiplied by the height and then halved (or halved then multiplied by height).
Area of Trapezium = h(top + bottom)/2

Question 7

What is Circumference?

Answer 7

Circumference is exactly like perimeter except it is for circles.

Question 8

How do you find the Circumference of a circle?

Answer 8

The circumference of a circle is the diameter of the circle multiplied by π.
Circumference of circle = πd

Question 9

How do you find the area of a circle?

Answer 9

The area of a circle is the radius squared then multiplied by π.
Area of circle = πr²