Geometry and Trigonometry · Matemáticas
Circles en el SAT
Circles asks about the equation of a circle, arc and sector measures, and relationships involving chords, tangents, and inscribed angles.
- Sección
- Matemáticas del SAT
- Dominio de contenido
- Geometry and Trigonometry
- Peso en la sección
- 15%
- Preguntas que cuentan
- Unas 6 por examen
De las preguntas que cuentan en esa sección
De 40 preguntas que cuentan en la sección
Cómo son las preguntas
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.
El error que cuesta puntos
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.
Cómo resolverlas
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.
Practica Circles ahora
Diez preguntas sobre esta destreza, sin cronómetro y con la explicación después de cada respuesta. No hace falta cuenta; si inicias sesión, la misma práctica también alimenta la precisión por destreza que lee tu plan de estudio.
Preguntas sobre 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.
Más destrezas de 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.