6.2 Plane Figures Lear inn g Objectives: res: triangles, parallelograms, rectangles, squares, rhombus res: rectangular solid, cube, pyramid, sphere, cylinder, cone 1. , trapezoids. Identify plane figu2. Identify solid figu3. Key Vocabulary: plane, plane figure, polygon, regular polygon, equilateral triangle, isosceles triangle, scalene triangle, right triangle, hypotenuse, legs, quadrilateral, circle, center, radius, diameter, solid. A. Identifying plane figures D finition:e T pe of Triangley1 . Right Triangle—is triangle containing a right angle. . 2 Acute Triangle—is triangle in which all the angles are acute. . 3 Obtuse Triangle—is triangle containing a obtuse angle. . 4 Scalene Triangle—is triangle with no equal sides. . Isosceles Triangle—is triangle with two equal sides. 5 . 6 Equilateral Triangle—is triangle with three equal sides. Example 1. Classify the type of each triangle. . 1 2. Sum of angles inside triangle = Example 2. o180 Find the measure of x ∠ o120 x o42
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