Perimeter is the total distance around the outside of a 2D shape.

True or False? To find the perimeter of a regular 2D shape you multiply the number of sides by the length of one side .

True. To find the perimeter of a regular 2D shape you multiply the number of sides by the length of one side .

Define the term compound shape .

A compound shape is a shape made up of two or more 2D shapes.

True or False? In a compound shape made up of two rectangles , the length of the two shorter sides opposite a longer side will add up to the same length as the longer side.

True. In a compound shape made up of two rectangles , the length of the two shorter sides opposite a longer side will add up to the same length as the longer side.

What does a ' dash ' on two or more sides of a shape in a diagram indicate?

All sides in a diagram that are annotated with a dash are of equal length .

Area is the amount of space taken up by a 2D shape .

What is a compound shape ?

A compound shapes refers to an "awkward" shape that can be split up into a combination of standard shapes .

True or False? The key to getting started on problem solving questions is to not focus only on what the question asks.

True. The key to getting started is to not focus only on what the question asks, but think about what you can do mathematically with all the information given. For example, you may want to annotate a diagram by splitting it into known shapes or use notation to identify equal lengths.

How do you find the area of a compound shape ?

First split the shape into a combination of standard shapes . Find the area of each of the standard shapes and add them together.

True or False? The area of a compound shape can be found by subtracting areas .

True. Although you may usually find the area of a compound shape by adding together the areas of standard shapes, sometimes it may be easier to find the area of a larger standard shape and subtract the area of another standard shape from it to find the area of the compound shape.

IGCSEMaths A: HigherEdexcelFlashcards

Area & Perimeter (Edexcel IGCSE Maths A)

Flashcards

1/15

FrontArea & Perimeter
Define perimeter.

Enjoying Flashcards?
Tell us what you think

Cards in this collection (15)

Define perimeter.
Perimeter is the total distance around the outside of a 2D shape.
True or False?
To find the perimeter of a regular 2D shape you multiply the number of sides by the length of one side.
True.
To find the perimeter of a regular 2D shape you multiply the number of sides by the length of one side.
Define the term compound shape.
A compound shape is a shape made up of two or more 2D shapes.
True or False?
In a compound shape made up of two rectangles, the length of the two shorter sides opposite a longer side will add up to the same length as the longer side.
True.
In a compound shape made up of two rectangles, the length of the two shorter sides opposite a longer side will add up to the same length as the longer side.
What does a 'dash' on two or more sides of a shape in a diagram indicate?
All sides in a diagram that are annotated with a dash are of equal length.
Define area.
Area is the amount of space taken up by a 2D shape.
What is the formula for the area of a triangle?
The formula for the area of a triangle is $A = \frac{1}{2} b h$
Where:
- $A =$ area
- $b =$ base
- $h =$ perpendicular height
What is the formula for the area of a rectangle?
The formula for the area of a rectangle is $A = l w$
Where:
- $A =$ area
- $l =$ length
- $w =$ width
What is the formula for the area of a parallelogram?
The formula for the area of a parallelogram is $A = b h$
Where:
- $A =$ area
- $b =$ base
- $h =$ perpendicular height
What is the formula for the area of a trapezium?
The formula for the area of a trapezium is $A = \frac{1}{2} (a + b) h$
Where:
- $A =$ area
- $a$ and $b$ are the lengths of the two parallel sides
- $h =$ perpendicular height
True or False?
The formula for the area of a circle is $A = 2 π r$ ?
False.
The formula for the area of a circle is $A = π r^{2}$
Where:
- $A =$ area
- $r =$ radius
What is a compound shape?
A compound shapes refers to an "awkward" shape that can be split up into a combination of standard shapes.
True or False?
The key to getting started on problem solving questions is to not focus only on what the question asks.
True.
The key to getting started is to not focus only on what the question asks, but think about what you can do mathematically with all the information given.
For example, you may want to annotate a diagram by splitting it into known shapes or use notation to identify equal lengths.
How do you find the area of a compound shape?
First split the shape into a combination of standard shapes. Find the area of each of the standard shapes and add them together.
True or False?
The area of a compound shape can be found by subtracting areas.
True.
Although you may usually find the area of a compound shape by adding together the areas of standard shapes, sometimes it may be easier to find the area of a larger standard shape and subtract the area of another standard shape from it to find the area of the compound shape.

1. Numbers & the Number System

2. Equations, Formulae & Identities

3. Sequences, Functions & Graphs

4. Geometry & Trigonometry

5. Vectors & Transformation Geometry

6. Statistics & Probability