The effect of enlargement on the perimeter of a shape
The starter and exit quiz of the lesson “The effect of enlargement on the perimeter of a shape”, from the unit “Similarity” (Year 10 Maths) by Oak National Academy.
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Oak National Academy
12 questions
Two variables are in direct proportion if they have a constant ___ relationship.
Some Oak pupils are discussing this graph. Which pupils are correct?
The ratio table shows the conversion €7 (Euros) = £6 (Pounds Sterling). €350 = £___
The perimeter of an octagon is 88 800 cm. Which calculation shows its perimeter in metres?
A circular sector with an angle of 60° has radius = 6 cm, arc length = 2π cm and area = 6π cm². The radius of the sector is increased to 18 cm. Find the arc length and area of the new sector.
The area of a triangle is 3400 cm². The area of the triangle in metres squared is ___ m².
A ___ factor is the multiplier between similar shapes that describes how large one shape is compared to the other.
This sector is enlarged by scale factor 2. The angle in the image is ___°.
Each square on this coordinate grid is 1 unit long. This object is enlarged by a scale factor of 3 to make its image. Calculate the perimeter of the image.
A pentagon has a perimeter of 60 cm. The pentagon is enlarged by scale factor 4. The perimeter of the image is ___ cm.
The object is enlarged by a scale factor of \frac{1}{3} to make the image. What is the perimeter of the image?
A shape is enlarged by a scale factor of \frac{2}{3} to make its image. The perimeter of the image is 25 cm. The perimeter of the object is ___ cm.
