Three Tools for Three Problems

Create a 8-slide teacher-led mathematics deck for 7th-grade students aged 12–13. The deck must teach exactly three applications: (1) area of a triangle given two sides and their included angle, using A = 1/2 ab sin C, with the worked example a = 8 cm, b = 5 cm, C = 30°, answer 10 cm²; (2) area of a minor circular segment as sector area minus triangle area, using radius 6 cm and central angle 60°, showing 6π − 9 sin 60° ≈ 11.3 cm²; and (3) bearings as three-digit clockwise angles from north, including the example bearing A to B = 060° and reverse bearing B to A = 240°. Include clear labeled diagrams, formula callouts, one misconception check per topic, degree-mode calculator reminder, and a final comparison slide. Do not introduce unrelated trigonometric ratios. Slides should support a 15-minute explanation, not contain a long student worksheet.

Lara from Teachy