video1.0<iframe src="https://www.loom.com/embed/599d02e6067f4ef683113bbd2adf6b0c" frameborder="0" width="1838" height="1378" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>13781838Loomhttps://www.loom.com13781838https://cdn.loom.com/sessions/thumbnails/599d02e6067f4ef683113bbd2adf6b0c-48bb067f24d42a0d.gif5646.591This Loom demonstrates grade 9 style geometry and trigonometry problem solving, focusing on calculating shaded areas using exact sector and triangle formulas. It works through examples using a sector with center radius 11, equilateral triangles with sine 60, and tangents implying right angles and 60 degree relationships, emphasizing exact answers and using calculator memory or the answer button to avoid rounding errors. It then shows related perimeter and angle calculations, including a sector with 220 out of 360 degrees and radius 6, using arc length, cosine rule to find a missing side, and assembling the final perimeter. The presenter also models solving multi-step triangle side lengths using sine rule and cosine rule in a cuboid context.