OregonOregon High School Geometry Curriculum
Video lessons and practice for every Geometry topic. Aligned to Oregon Mathematics Standards so students can keep up with class or get ahead.
Oregon High School Geometry Curriculum | StudyPugHelp
ID | Standard | StudyPug Topic |
|---|---|---|
CC.HSG.CO.A.1 | Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc. |
CC.HSG.CO.A.2 | Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not. |
CC.HSG.CO.A.3 | Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself. |
CC.HSG.CO.B.6 | Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent. |
CC.HSG.CO.B.7 | Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent. |
CC.HSG.CO.B.8 | Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions. |
CC.HSG.CO.C.9 | Prove theorems about lines and angles. |
CC.HSG.CO.C.10 | Prove theorems about triangles. |
CC.HSG.CO.C.11 | Prove theorems about parallelograms. |
CC.HSG.CO.D.12 | Make formal geometric constructions with a variety of tools and methods. |
CC.HSG.CO.D.13 | Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle. |
CC.HSG.SRT.A.1 | Verify experimentally the properties of dilations given by a center and a scale factor. |
CC.HSG.SRT.A.2 | Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides. |
CC.HSG.SRT.B.4 | Prove theorems about triangles. |
CC.HSG.SRT.B.5 | Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures. |
CC.HSG.SRT.C.6 | Understand that by similarity, side ratios in right triangles are properties of the angles in the triangle, leading to definitions of trigonometric ratios for acute angles. |
CC.HSG.SRT.C.7 | Explain and use the relationship between the sine and cosine of complementary angles. |
CC.HSG.SRT.C.8 | Use trigonometric ratios and the Pythagorean Theorem to solve right triangles in applied problems. |
CC.HSG.C.A.1 | Prove that all circles are similar. |
CC.HSG.C.A.2 | Identify and describe relationships among inscribed angles, radii, and chords. |
CC.HSG.C.A.3 | Construct the inscribed and circumscribed circles of a triangle, and prove properties of angles for a quadrilateral inscribed in a circle. |
CC.HSG.C.A.4 | Construct a tangent line from a point outside a given circle to the circle. |
CC.HSG.C.B.5 | Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector. |
CC.HSG.GPE.A.1 | Derive the equation of a circle of given center and radius using the Pythagorean Theorem; complete the square to find the center and radius of a circle given by an equation. |
CC.HSG.GPE.A.2 | Derive the equation of a parabola given a focus and directrix. |
CC.HSG.GPE.A.3 | Derive the equations of ellipses and hyperbolas given the foci, using the fact that the sum or difference of distances from the foci is constant. |
CC.HSG.GPE.B.4 | Use coordinates to prove simple geometric theorems algebraically. |
CC.HSG.GPE.B.5 | Prove the slope criteria for parallel and perpendicular lines and use them to solve geometric problems. |
CC.HSG.GPE.B.6 | Find the point on a directed line segment between two given points that partitions the segment in a given ratio. |
CC.HSG.GPE.B.7 | Use coordinates to compute perimeters of polygons and areas of triangles and rectangles, e.g., using the distance formula. |
CC.HSG.GMD.A.1 | Give an informal argument for the formulas for the circumference of a circle, area of a circle, volume of a cylinder, pyramid, and cone. |
CC.HSG.GMD.A.3 | Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems. |
CC.HSG.GMD.B.4 | Identify the shapes of two-dimensional cross-sections of three-dimensional objects, and identify three-dimensional objects generated by rotations of two-dimensional objects. |
CC.HSG.MG.A.1 | Use geometric shapes, their measures, and their properties to describe objects. |
CC.HSG.MG.A.2 | Apply concepts of density based on area and volume in modeling situations. |
CC.HSA.SSE.A.1 | Interpret expressions that represent a quantity in terms of its context. |
CC.HSA.SSE.B.3 | Choose and produce an equivalent form of an expression to reveal and explain properties of the quantity represented by the expression. |
CC.HSA.CED.A.1 | Create equations and inequalities in one variable and use them to solve problems. Include equations arising from linear and quadratic functions, and simple rational and exponential functions. |
CC.HSA.CED.A.2 | Create equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales. |
CC.HSA.CED.A.3 | Represent constraints by equations or inequalities, and by systems of equations and/or inequalities, and interpret solutions as viable or non-viable options in a modeling context. |
CC.HSA.CED.A.4 | Rearrange formulas to highlight a quantity of interest, using the same reasoning as in solving equations. |
CC.HSA.REI.C.7 | Solve a simple system consisting of a linear equation and a quadratic equation in two variables algebraically and graphically. |
CC.HSF.IF.C.7 | Graph functions expressed symbolically and show key features of the graph, by hand in simple cases and using technology for more complicated cases. |
CC.HSS.ID.B.6 | Represent data on two quantitative variables on a scatter plot, and describe how the variables are related. |
Oregon High School Geometry: What Students Learn
Oregon Geometry courses follow the Oregon Mathematics Standards and cover a wide range of topics that form the backbone of high school mathematics. Students begin by building precise definitions of fundamental geometric figures — points, lines, angles, circles, and segments — then move into transformations, proofs, similarity, trigonometry, and analytic geometry.
Transformations and Congruence
One of the first major units in Oregon Geometry focuses on transformations in the plane. Students learn how rotations, reflections, and translations move figures while preserving distance and angle. They use these rigid motions to define congruence: two figures are congruent when one can be mapped onto the other by a sequence of rigid motions. From there, students prove triangle congruence criteria — ASA, SAS, and SSS — and apply them to geometric proofs about lines, angles, and parallelograms.
Similarity and Trigonometry
After mastering congruence, students explore similarity transformations, including dilations. They learn the AA criterion for triangle similarity and apply similarity to derive the definitions of trigonometric ratios — sine, cosine, and tangent — for acute angles in right triangles. Students then use the Pythagorean Theorem and trigonometric ratios to solve applied problems, a skill that appears frequently on the Oregon 11th grade SBAC Math assessment.
Circles and Geometric Constructions
Oregon Geometry students study the properties of circles in depth, including inscribed angles, chords, tangent lines, and arc length. They construct inscribed and circumscribed circles of triangles and prove that all circles are similar. Students also learn formal geometric constructions using compass and straightedge, including equilateral triangles, squares, and regular hexagons inscribed in circles.
Coordinate and Analytic Geometry
Students connect algebra and geometry by working with equations of circles and parabolas derived from the Pythagorean Theorem and distance formulas. They prove slope criteria for parallel and perpendicular lines, partition directed line segments, and compute perimeters and areas using coordinates. This unit reinforces algebra skills students developed in earlier Oregon courses.
Volume, Modeling, and Data
The course wraps up with three-dimensional geometry: cross-sections of solids, volumes of cylinders, pyramids, cones, and spheres, and applying density concepts to modeling problems. Students also revisit algebraic expressions, equations, and scatter plots in geometric contexts, connecting Geometry to the broader Oregon high school math sequence.
- Transformations: rotations, reflections, translations, and dilations
- Congruence proofs: ASA, SAS, SSS, and rigid motion definitions
- Similarity: AA criterion, proportional sides, and trigonometric ratios
- Circles: inscribed angles, arc length, sector area, and tangent lines
- Coordinate geometry: equations of circles, parabolas, and slope criteria
- Volume and modeling: cylinders, cones, pyramids, and spheres