Exercise 9.5 | Geometry & Polygons | Interior & Exterior Angles | Mathematics 9 | Federal Board NBF
Exercise 9.5 | Geometry & Polygons | Interior & Exterior Angles | Mathematics 9 | Federal Board NBF Master Exercise 9.5: Learn all about polygons, their interior and exterior angles in this comprehensive lecture. Topics include finding the number of sides, angles of regular polygons, ratios of angles, and proofs of angle properties. Perfect for Grade 9 Mathematics (Federal Board). Includes detailed step-by-step solutions and easy navigation with timestamps. Topics Covered: Polygons Exterior Angles Interior Angles Watch the complete series of lectures for Geometry & Polygons by exploring our playlist link here: • Geometry & Polygons | Class 9 Mathema... Timestamps for Easy Navigation: 00:00:00 - Overview of Polygon, their interior and exterior angles. 00:07:00 - Q1: Find number of sides of polygons if their exterior angles are given. (Part i-iv) 00:05:20 - Q2: Draw a regular pentagon whose exterior angles are p, q, r, s, t, and each interior angle is k. What is the measure of: i) Exterior angles ii) Interior angles 00:17:07 - Q3: Each interior angle of a polygon is 5 times the exterior angle of the polygon. Find the number of sides. 00:20:45 - Q4: Find the minimum and maximum exterior angles possible in a regular polygon. Give reasons to support the answer. 00:25:40 - Q5: Find the exterior angles of a regular polygon (Part i-iv). 00:27:35 - Q6: The ratio between exterior and interior angles of a polygon is 1:2. Find: i) Measure of each exterior angle ii) Measure of each interior angle iii) Number of sides of the polygon 00:31:07 - Q7: Is it possible to have a regular polygon where each exterior angle is 50? Give reasons to support your answer. 00:33:25 - Q8: Name the polygon whose sum of interior angles is equal to the sum of exterior angles. 00:36:25 - Q9: Sum of all interior angles of a regular polygon is 4 times the sum of exterior angles. Identify the polygon. 00:39:33 - Q10: An exterior angle of a regular polygon is 12°. What is the sum of all interior angles? 00:42:00 - Q11: Prove that each interior angle and its corresponding exterior angle in any polygon is supplementary. 00:45:00 - Q12: Find the number of sides in a regular polygon when the measure of each exterior angle is 72°. 00:46:15 - Q13: The exterior angles of a pentagon are given. Find the measure of each angle. 00:49:50 - Q14: A convex polygon has 14 diagonals. Find the number of sides of the polygon. 00:53:00 - Q15: Find the sum of all interior angles of a polygon having 13 sides. 00:53:47 - Q16: The sum of all interior angles of a polygon is 2880°. How many sides does the polygon have? Keywords: Exercise 9.5 Mathematics 9 Interior and Exterior Angles of Polygons Polygons Geometry Regular and Irregular Polygons Federal Board Class 9 Mathematics Geometry for Class 9 Polygon Angles and Properties Federal Board NBF Mathematics Class 9 Math Solutions #Exercise9.5 #mathematics9 #polygons #interiorangles #exteriorangles #Geometry #federalboard #class9mathematics #RegularPolygons #mathsolutionsforyou @NationalBook
