What is the length of mn ?

round to the nearest tenth of a unit.

Answer

Find out the length of MN .

To prove

Formula

Two points be M (2, -2) and N(8,4) .

Put in the formula

Solving the above

Distance formula = 8.5 unit (approx)

Therefore the length of MN is  8.5 unit (approx) .

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.