I can apply the Pythagorean Theorem to find the distance between two points on a map or coordinate plane. 

I can find the perimeter of a figure on a coordinate plane. 

I can identify the coordinates of the third vertex of a triangle on the coordinate plane. 

DISTANCE ON THE COORDINATE PLANE

You can use the Pythagorean Theorem to find the distance between any two

points, P and Q, on the coordinate plane.

Diagram callout: "Draw a right triangle with side PQ as its hypotenuse."

DIAGRAM DESCRIPTION

A coordinate plane shows P and Q joined by a slanted blue segment.

A dashed right triangle is drawn with the horizontal leg labeled a,

vertical leg labeled b, and hypotenuse labeled c (segment PQ).

The point labels P and Q appear beside the segment.

The Pythagorean Theorem can then be used: a^2 + b^2 = c^2.

The plotted points appear to be P = (1, 1) and Q = (4, 3), giving

legs of 3 and 2 units and distance sqrt(13) units.