Question 30: Please help, which set of rigid motions could be used to show that triangle ABC is congruent to triangle DEF?

The set of rigid motions could be used to show that triangle ABC is congruent to triangle DEF is " a horizontal translation and a vertical translation" ⇒ D

Step-by-step explanation:

∵ Δ DEF has the same direction as Δ ABC

∵ Δ DEF is congruent to Δ ABC

∴ The translation is using

∵ Δ DEF is right and below to Δ ABC

∴ There are horizontal and vertical translation

The set of rigid motions could be used to show that triangle ABC is congruent to triangle DEF is " a horizontal translation and a vertical translation"

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.