Enlargements and Constructions (Leaving Cert Mathematics): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What property of a shape remains unchanged during an enlargement?
What property of a shape remains unchanged during an enlargement?
The angles
If an object side is 4 cm and the image side is 10 cm, what is the scale factor?
If an object side is 4 cm and the image side is 10 cm, what is the scale factor?
2.5
What happens to a figure when the scale factor is greater than 1?
What happens to a figure when the scale factor is greater than 1?
It gets bigger
What is an enlargement with scale factor less than 1 called?
What is an enlargement with scale factor less than 1 called?
A reduction
If a shape is enlarged by scale factor , how does the area change?
If a shape is enlarged by scale factor , how does the area change?
Area multiplied by
How do you find the centre of enlargement from object and image?
How do you find the centre of enlargement from object and image?
Join vertices, extend until they meet
When a vertex is the centre of enlargement, what happens to that vertex?
When a vertex is the centre of enlargement, what happens to that vertex?
It doesn't move
What two pieces of information are needed to draw an enlargement?
What two pieces of information are needed to draw an enlargement?
Centre and scale factor
If scale factor is 3 and object side is 5 cm, what is the image side length?
If scale factor is 3 and object side is 5 cm, what is the image side length?
15 cm
If object area is 12 cm² and image area is 48 cm², what is the scale factor?
If object area is 12 cm² and image area is 48 cm², what is the scale factor?
2
In an enlargement, what happens to the proportions of the shape?
In an enlargement, what happens to the proportions of the shape?
They stay exactly the same
If scale factor is 2.5, what is the ratio of object side to image side?
If scale factor is 2.5, what is the ratio of object side to image side?
1 : 2.5