Are the following statements ALWAYS, SOMETIMES, or NEVER true? A segment has two endpoints. Vertical angles are supplementary. A linear pair forms complementary angles. Adjacent angles form a linear pair. A ray has no endpoints. Perpendicular lines form congruent angles. Problem of the Day
Section 1-6 Two-Dimensional Figures
Then Now Objectives You measured one- dimensional figures. Find perimeter of two-dimensional figures.
Common Core State Standards Content Standards Mathematical Practices Common Core State Standards G.GPE.7 – Use coordinates to compute perimeters of polygons and areas of triangles and rectangles. 2) Reason abstractly and quantitatively. 6) Attend to precision.
Naming a Polygon
Equilateral Polygon: a polygon in which all sides are congruent Equilateral Polygon: a polygon in which all sides are congruent. Equiangular Polygon: a polygon in which all angles are congruent. Regular Polygon: a polygon that is both equilateral and equiangular. Vocabulary
Find the perimeter of ∆ABC with vertices A(-1, 4), B(-1, -1), and C(6, -1). Example 4
Find the perimeter of ∆ABC with vertices A(-1, 2), B(3, 6), and C(3, -2). Example 4