ACT Math: Geometry Questions You’ll Definitely See
Geometry makes up about 35% of ACT Math questions. Mastering these concepts is essential for a strong score.
Key Topics
Triangles (area, Pythagorean theorem, special triangles), circles (area, circumference, arc length), coordinate geometry (slope, distance, midpoint), and volume of 3D shapes.
Formulas to Memorize
The ACT does not provide a formula sheet. Memorize area formulas for triangles, circles, rectangles, and trapezoids. Know the Pythagorean theorem and special right triangle ratios.
Strategy
Draw diagrams for word problems. Label all known values. Look for right triangles hidden in complex figures. Estimate when possible to eliminate wrong answers.
