Geometry Study Guide 2026
Everything you need to pass the Geometry exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Geometry Exam Format at a Glance
📚 Geometry Topics to Study (69)
✍️ Sample Geometry Questions & Answers
1. What is the coordinate plane?
The coordinate plane is a fundamental tool in geometry, consisting of two perpendicular number lines: the horizontal x-axis and the vertical y-axis, intersecting at the origin (0,0). It provides a system for precisely locating points and graphing equations in two dimensions.
2. To construct a regular hexagon inscribed in a circle, you:
The radius of a circle equals the side length of the inscribed regular hexagon, so stepping the compass radius around the circle marks six equally spaced points.
3. In a 30-60-90 triangle, if the shortest side is 5, what is the hypotenuse?
The hypotenuse is twice the shortest side, so 2 × 5 = 10.
4. Which solid has one circular base and a single vertex (apex)?
A cone has one circular base narrowing to a single apex.
5. In a circle of radius 10, a sector has area 25π. What is its central angle?
25π = (θ/360)π(100), so θ/360 = 1/4, giving θ = 90°.
6. Which quadrilateral has exactly one pair of parallel sides?
A trapezoid is defined by having exactly one pair of parallel sides.