I need help with 7 and 8 pls

7) H

8) C

Step-by-step explanation:

7)

Dilation is a transformation we apply that increases the dimensions of something proportionally, that is, each dimension is multiplied by the same constant value.

Therefore, the correct option is H, where the x and y coordinates are multiplied by the same value (3).

8)

We can see in steps 1 and 2 that he draws the heights relatives to the sides AB and BC. The crossing point of heights in a triangle is known as the orthocenter (point D). the third figure shows that the triangle is inscribed in a circumference (all the vertex of the triangle are on the circumference). If the triangle is inscribed within the circumference, the circumference is circumscribed about the triangle.

So the correct option is C.