Need help with 6, 7 and 8 please help and I will mark brainliest

Two rigid transformations are used to map δhjk to δlmn. the first is a translation of vertex h to vertex l. what is the second transformation? a reflection across the line containing hk a rotation about point h a reflection across the line containing hj a rotation about point k

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?