Skip to main content
California Department of Education Logo

G-SRT.9 (Mathematics)


Standard Identifier: G-SRT.9
Content Area: Mathematics
Grade Range: 9–12
Domain: Similarity, Right Triangles, and Trigonometry
Discipline: Math III
Conceptual Category: Geometry

Cluster:
Apply trigonometry to general triangles.

Standard:
(+) Derive the formula A = 1/2 ab sin(C) for the area of a triangle by drawing an auxiliary line from a vertex perpendicular to the opposite side.

Questions: Curriculum Frameworks and Instructional Resources Division | CFIRD@cde.ca.gov | 916-319-0881