Question

Please can anyone Help ASAP

Answer 1

See below.

Explanation:

She is wrong because 3 times the perimeter of one triangle is the sum of 9 sides of the triangles.

In the shape we see that some of the sides of the triangles are 'shared' and dare not part of the perimeter of the shape, - the perimeter is only the length of 5 sides of a triangle.

So the perimeter is less than the sum of the sides of the 3 triangles.

Answer 2

Jemima is wrong because perimeter is sum of all sides and the perimeter of this figure would be the outer sides of it and not the inner sides.