Find areas of similar shapes given corresponding lengths

Maths

Shape A and shape B are similar. Calculate the area of shape B.

Two similar triangles have heights of 2 cm and 10 cm. The area of the smaller triangle is 5 cm². Calculate the area of the larger triangle.

Triangle A and triangle B are similar. Calculate the base length of triangle B.

Shape A maps to shape B in an enlargement, calculate the scale factor.

They help with finding the centre of enlargement.

Why have corresponding vertices been joined up in shapes A and B with straight lines in this enlargement?

The point at (-2,-1) is enlarged by a scale factor of -2 from the centre of enlargement at (0,0). What will the new coordinate of the point be?