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Lesson: Finding the Area of Triangles Using Determinants

Learn how to calculate areas of triangles using determinants in this lesson. Learn how the coordinates of a triangle can be arranged in a three-by-three matrix with a column of ones whose determinant is the area of the triangle.

Worksheet: Finding the Area of Triangles Using Determinants • 12 Questions

Q1:

Find the area of the triangle below using determinants.

A26 square units
B18 square units
C13 square units
D36 square units

Q2:

Find the area of the triangle below using determinants.

A34 square units
B19 square units
C17 square units
D38 square units

Q3:

Find the area of the triangle below using determinants.

A44 square units
B16 square units
C22 square units
D32 square units

Q4:

Find the area of the triangle below using determinants.

A26 square units
B15 square units
C13 square units
D30 square units

Q5:

Find the area of the triangle below using determinants.

A60 square units
B20 square units
C30 square units
D40 square units

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