Plane Geometry Problem Solving: Part 1/2

Past Board Exam Problems in Plane Geometry Part 1/2 PROBLEMS: 1. Each angle of a regular dodecagon is equal to: 2. How many sides have a polygon if the sum of the interior angles is 1080°? 3. A trapezoid has an area of 36 sq. m. and an altitude of 2m. Its two bases have a ratio of 4:5. What are the lengths of the bases? 4. The distance between the centers of three circles which are mutually tangent to each other externally are 10, 12 and 14 units. What is the area of the largest circle? 5. The sides of a triangle are 8, 10 and 14 cm. Determine the radius of the circumscribing circle. 6. The sides of a triangle are 8, 10 and 14 cm. Determine the radius of the inscribed circle. Applicable Calculator Technique: Multi-line Function (Heron's Formula)    • How to Solve a Multi Line Function (Applie...