Find the perimeter of triangle pqr. round your answer to the nearest tenth.

19.7 units
16 units
8 units
7.2 units

 The correct option is

(A) 19.7 units.

Step-by-step explanation:  We are given to find the perimeter of triangle PQR and round the answer to the nearest tenth.

From the figure, we note that the co-ordinates of the vertices of triangle PQR are P(-2, 1), Q(6, 1) and R(4, -3).

We know that the perimeter of a triangle is equal to the sum of the lengths of its three sides.

The lengths of the sides PQ, QR and PR can be calculated using distance formula as follows :

Therefore, the perimeter of triangle PQR is given by

Rounding to the nearest tenth, we get

p = 19.7 units.

Thus, the required perimeter of triangle PQR is 19.7 units.

Option (A) is CORRECT.

a

b

d

step-by-step explanation: