{"product_id":"right-triangle-trigonometry-math-mystery-worksheets-grades-9-11-sine-cosine-tangent","title":"Right Triangle Trigonometry | Math Mystery Worksheets | Grades 9–11 | Sine Cosine Tangent","description":"\u003cp\u003e\u003cstrong\u003eSOHCAHTOA becomes a worksite investigation across seven cases\u003c\/strong\u003e — students find the missing side or angle of each right triangle, write the answer in the box beside it, match it to a suspect, and cross suspects off until one is left standing. This no-prep, printable, self-checking Math Mystery keeps geometry and Algebra 2 students engaged and works for math centers, bell work, homework, early finishers, substitute\/relief days, spiral review, and test prep. The first five cases find sides; the last two switch to inverse trig and missing angles.\u003c\/p\u003e\n\n\u003ch3\u003eQuick Details\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSkill:\u003c\/strong\u003e Right triangle trigonometry — sine, cosine, tangent and their inverses · \u003cstrong\u003eGrades:\u003c\/strong\u003e 9–11 · \u003cstrong\u003eFormat:\u003c\/strong\u003e 7 mysteries + full answer keys (printable PDF) · \u003cstrong\u003eTheme:\u003c\/strong\u003e Engineering worksite\u003c\/p\u003e\n\n\u003ch3\u003eThe 7 Mysteries\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe Roof Pitch Puzzle\u003c\/strong\u003e — The roof plans on the site have all been switched, and students find the missing side of each right triangle to work out who did it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Flagpole File\u003c\/strong\u003e — Every flagpole on the parade ground was reset overnight.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Sign Post Swap\u003c\/strong\u003e — The signs outside every shop have been swapped around.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Zip Line Zigzag\u003c\/strong\u003e — Someone re-strung the zip lines at the adventure park, and each case turns on finding the hypotenuse.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Drawbridge Dodge\u003c\/strong\u003e — The drawbridge drawings came back from the printer wrong.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Crane Arm Caper\u003c\/strong\u003e — The dockyard cranes were all left at the wrong setting, so students find the size of each missing angle.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Radar Room Ruse\u003c\/strong\u003e — Every radar screen in the tower is reading the wrong bearing, and inverse trig is the only way to the answer.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Teachers Love It\u003c\/h3\u003e\n\u003cp\u003eZero prep — print and teach. The built-in answer keys make every case self-checking, so students get instant feedback and stay motivated. The detective hook pulls in reluctant and struggling learners, and because the pack moves from finding sides to finding angles, one file covers both halves of the unit.\u003c\/p\u003e\n\n\u003ch3\u003eSkills Covered\u003c\/h3\u003e\n\u003cp\u003eChoosing the correct ratio from SOHCAHTOA, finding a missing leg, finding the hypotenuse, using inverse sine, cosine and tangent to find a missing angle, and labelling opposite, adjacent and hypotenuse correctly — plus logical reasoning and deductive elimination as students rule suspects out clue by clue.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cp\u003ePrintable one-page mystery worksheets, a labelled right triangle on every problem, suspect line-ups, complete answer keys with the villain marked, and student instructions — all in one PDF.\u003c\/p\u003e\n\n\u003ch3\u003eBest Used For\u003c\/h3\u003e\n\u003cp\u003eTrigonometry practice in math centers, bell work, homework, early finishers, substitute\/relief days, spiral review, and end-of-unit test prep for grades 9–11.\u003c\/p\u003e\n\n\u003ch3\u003eMore From This Line\u003c\/h3\u003e\n\u003cp\u003eBrowse every \u003ca href=\"\/collections\/math-mystery\"\u003eMath Mystery pack\u003c\/a\u003e, or keep the geometry unit going with \u003ca href=\"\/products\/pythagorean-theorem-math-mystery-worksheets-grades-7-9-missing-sides-and-distance\"\u003ePythagorean Theorem\u003c\/a\u003e and \u003ca href=\"\/products\/volume-of-cylinders-cones-and-spheres-math-mystery-worksheets-grades-7-9-formulas\"\u003eVolume of Cylinders, Cones and Spheres\u003c\/a\u003e.\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62264443076978,"sku":"17419363","price":4.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/right-triangle-trigonometry-math-mystery-worksheets-geometry-grades-9-11-no-prep.jpg?v=1788134853","url":"https:\/\/kiwilandeducation.com\/products\/right-triangle-trigonometry-math-mystery-worksheets-grades-9-11-sine-cosine-tangent","provider":"Kiwiland Education","version":"1.0","type":"link"}