Which statement correctly describes the relationship between △def and △d′e′f′ ? △def is congruent to △d′e′f′ because you can map △def to △d′e′f′ using a reflection across the x-axis, which is a rigid motion. △def is congruent to △d′e′f′ because you can map △def to △d′e′f′ using a reflection across the y-axis, which is a rigid motion. △def is congruent to △d′e′f′ because you can map △def to △d′e′f′ using a rotation of 180° about the origin, which is a rigid motion. △def is not congruent to △d′e′f′ because there is no sequence of rigid motions that maps △def to △d′e′f′.

6 hours 48 min

step-by-step explanation:

68÷5=13.6

13.6×30=408min=6 hours 48 min.

hope to and hope that my answer is brainliest.(follow me )

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.