Sample 1999 Augmented STAR Math Items

High School Geometry
Standard 10
Students compute areas of polygons including rectangles, scalene triangles,
equilateral triangles, rhombi, parallelograms, and trapezoids

A trapezoidal section of a park is divided into 3 right triangles with measurements as shown in the drawing.

What is the area of the shaded triangle?

A    8.94m2
B    9m2
C    10m2
D    20m2

(Correct answer is C)

© 1999 by the California Department of Education

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