Question

please help. Shape Y is an enlargement of shape X by a scale factor of 3. Work out lengths a and b. no​

Answer 1

a = 3, b = 9

Explanation:

What is a scale factor?

A scale factor is the number that you multiply each side of a shape to enlarge it. A scale factor of 3 means that each side of the new shape is three times the size of the original.

If the new shape is 3 times the size of the original, then we can take the side lengths (3 and 1) and multiply them by 3.

• 3 × 1 = 3 (side a)

• 3 × 3 = 9 (side b)

Therefore, the length of a is 3, whereas the length of b is 9.