The perimeter of APQR with vertices P(-2, 9), Q(7, -3), and R(-2, -3) in the coordinate plane is 036 units.
A perimeter is the sum of all sides of a closed figure.
The points P(-2,9) and R(-2,-3) have the same x-coordinate.
Similarly, the points Q(7,-3) and R(-2,-3) have the same y coordinate.
Therefore the line PR is perpendicular to line RQ
In other words, PRQ is a triangle that is right angled at R
Hence perimeter of the right-angled triangle =
Distance PR=
Distance QR=
Distance PQ=
The perimeter of the right-angled triangle is:
Perimeter of the right-angled triangle PQR =12+9+15=36
What is the perimeter?
- It is the sum of all sides of a closed figure.
- It is also defined as the total length of the boundary.
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