# Coordinate Planes - Area of Triangle

Objective: I know how to calculate the area of a triangle given the coordinates of the vertices.

Step 1: Plot the points of the ordered pairs.

Step 2: Find the length and height of the triangle.

Step 3: Find the area of the triangle.

Read the lesson on coordinate planes if you need to lean about ordered pairs and coordinate plaies.

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Solve the following
Find the area of the triangle whose vertices are
(-3, -5), (2, -5), and (-3, -1)
Area = square units

Find the area of the triangle whose vertices are
(1, -1), (4, 6), and (1, 6)
Area = square units

Find the area of the triangle whose vertices are
(-2, -2), (6, -2), and (6, 7)
Area = square units

Find the area of the triangle whose vertices are
(15, 3), (7, 3), and (7, 7)
Area = square units

Find the area of the triangle whose vertices are
(3, -3), (7, -8), and (7, -3)
Area = square units

Find the area of the triangle whose vertices are
(3, 8), (6, 8), and (6, 14)
Area = square units

Find the area of the triangle whose vertices are
(5, 10), (5, 3), and (14, 3)
Area = square units

Find the area of the triangle whose vertices are
(11, 9), (5, 9), and (5, 5)
Area = square units

Find the area of the triangle whose vertices are
(-7, 12), (-13, 7), and (-7, 7)
Area = square units

Find the area of the triangle whose vertices are
(-8, 12), (1, 4), and (-8, 4)
Area = square units

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