Geometry and Trigonometry · Mathématiques
Circles au SAT
Circles asks about the equation of a circle, arc and sector measures, and relationships involving chords, tangents, and inscribed angles.
- Section
- Mathématiques du SAT
- Domaine de contenu
- Geometry and Trigonometry
- Part de la section
- 15%
- Questions notées
- Environ 6 par épreuve
Parmi les questions notées de cette section
Sur 40 questions notées dans la section
À quoi ressemblent les questions
A circle given by an equation, a sector with an angle, or a diagram with an inscribed angle, asking for the center, the radius, an arc length, or an angle.
L'erreur qui coûte des points
Reading the center sign wrong from the equation, and forgetting that an inscribed angle is half the central angle that opens onto the same arc.
Comment la traiter
Complete the square to reach the standard form before reading anything off the equation, and label the circle's parts on the figure before choosing a formula.
Entraîne-toi sur Circles
Dix questions sur cette compétence, sans chrono, avec l'explication après chaque réponse. Aucun compte requis ; connecte-toi et le même entraînement alimente aussi la précision par compétence que lit ton plan d'étude.
Questions sur Circles
- What is the standard equation of a circle?
- The squared distance form, with the center's coordinates subtracted from x and y and the radius squared on the right. Two squared terms with equal coefficients is the shape to look for.
- How do you find an arc length?
- Take the central angle as a fraction of the full turn and multiply by the circumference. Sector areas work the same way with the full area in place of the circumference.
- How many Circles questions are on the SAT?
- College Board does not publish a count per question type, only per content domain. Geometry and Trigonometry makes up about 15 percent of the Math section, which is roughly 6 of the 40 scored Math questions on a full form. Questions on this skill come out of that share.
Autres compétences en Geometry and Trigonometry
- Area and volumeArea and volume asks you to work with the formulas for rectangles, triangles, circles, cylinders, and prisms, usually with a change to one dimension.
- Lines, angles, and trianglesThese questions cover angle relationships, the triangle angle sum, similarity, and congruence inside a figure.
- Right triangles and trigonometryRight triangles covers the Pythagorean theorem, the special right triangles, and the sine, cosine, and tangent ratios.