Geometry Review By Mr. Hemmert

ALCOS G1: Identify triangles, quadrilaterals, pentagons, hexagons, or octagons based on the number of sides, angles, and vertices. G1.1 Demonstrating slides (translations), flips (reflections), and turns (rotations) using triangles, quadrilaterals, pentagons, hexagons, or octagons. G1.2 Drawing lines of symmetry in triangles, quadrilaterals, pentagons, hexagons, or octagons.

Lesson 8-1 Relating Solids and Plan Figures A plane figure (flat shape) has just two dimensions, length and width.

Lesson 8-1 Relating Solids and Plan Figures A solid figure has three dimensions, length, width, and height.

Lesson 8-1 Relating Solids and Plan Figures A prism has the same cross section all along its length! Example: The cross section of this object is a triangle ... it has the same cross section all along its length ... and so it's a triangular prism.

Can you identify these solids? Triangular prism

Can you identify these solids? Cone

Can you identify these solids? cylinder

Can you identify these solids? Cube

Can you identify these solids? Sphere

Can you identify these solids? Square pyramid

Can you identify these solids? Triangular Prism

Lesson 8-2 Polygons A polygon is a closed plane figure made up of line segments. Each line segment is a side. The point where the sides meet is called a vertex.

Polygons – Can you name the polygon? Triangle

Polygons – Can you name the polygon? Quadrilateral – 4 sides

Polygons – Can you name the polygon? Hexagon – Six Sides

Polygons – Can you name the polygon? What polygon has 8 sides and 8 vertices? Octagon

Polygons – Can you name the polygon? What do we call a polygon that has 5 sides and 5 vertices? Pentagon

Polygons – Can you name the polygon? What do we call a polygon that has 10 sides and 10 vertices? Decagon

Lines, Line Segments, Rays, and Angles A point is an exact location in space.

Lines, Line Segments, Rays, and Angles A line is a straight path of points that goes on and on in two directions.

Lines, Line Segments, Rays, and Angles A line segment is part of a line. It has two endpoints.

Lines, Line Segments, Rays, and Angles A ray is part of a line. It has one endpoint and continues on and on in only one direction.

Can you identify the following lines? Name Three Rays: ___________, __________, ________

Can you identify the following angles? Can you identify an obtuse angle? __________ Can you identify a straight angle? __________ Can you identify an acute angle? __________

Congruent Figures and Motions Lesson 8-6 What does congruent mean? Click here to learn more about slides, turns, and flips