{"product_id":"measuring-angles-with-a-protractor-mystery-detective","title":"Measuring Angles with a Protractor | Mystery Detective | Grades 3–6 | Lighthouse","description":"\u003cp\u003eThese measuring angles with a protractor worksheets for 4th grade are ten CSI Mini Mystery Detective math cases with a lighthouse theme. They cover reading angles in degrees, angle addition, and complementary and supplementary angles. Use these geometry activities in math centers, morning work, small groups and homework. They're no prep, and there's an answer key for every case.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eEvery case is set around a lighthouse on a stormy coast. Students read angles on both protractor scales, find the angle between two rays, and work out missing angles on a straight line or inside a right angle. They match each angle to a suspect and cross that name off, which means they check their own measuring as they go. Every page is self-checking.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Inside\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTen one-page detective cases on measuring angles, each with an answer key\u003c\/li\u003e\n\u003cli\u003eA large, clear protractor on every page, marked to the nearest degree\u003c\/li\u003e\n\u003cli\u003eCases that build from reading both scales to angles between two rays, adding angles, straight lines, right angles and obtuse angles\u003c\/li\u003e\n\u003cli\u003eA reference page on using a protractor, choosing the right scale, and adding and subtracting angles\u003c\/li\u003e\n\u003cli\u003eA contents page, teacher instructions, a detective case log and a certificate of achievement\u003c\/li\u003e\n\u003cli\u003e30 black and white pages, ready to print\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe Cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Dark Lighthouse\u003c\/strong\u003e - reading angles on both scales\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Stolen Lens\u003c\/strong\u003e - reading angles to the nearest degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Cut Anchor Chain\u003c\/strong\u003e - the angle between two rays\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Missing Key\u003c\/strong\u003e - two rays, to the nearest degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Foghorn Prank\u003c\/strong\u003e - adding angles together\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Fake Sea Map\u003c\/strong\u003e - missing angles on a straight line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Runaway Rowboat\u003c\/strong\u003e - missing angles in a right angle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Fake SOS\u003c\/strong\u003e - every kind of angle, to the degree\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Shipwreck Gold\u003c\/strong\u003e - obtuse angles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThe Ghost Ship\u003c\/strong\u003e - mixed angle problems\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhen to Use This Resource\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe cases build from reading a protractor to mixed angle problems. You can hand out one case at a time through the geometry unit or pull a single page when a group needs more protractor practice. The first cases suit students holding a protractor for the first time, and the later ones stretch a class that is ready for unknown angles and angle addition. Guided math groups, test prep, sub plans, early finishers and homeschool lessons all work too.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGrade Levels\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWritten for 4th grade, where students first measure angles in whole-number degrees and learn that angles add together. It also makes a quick review for 5th graders before they classify and measure angles in more detail.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy Teachers Love Mystery Detectives\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eZero prep\u003c\/li\u003e\n\u003cli\u003eEvery correct angle crosses off a suspect\u003c\/li\u003e\n\u003cli\u003eLeveled cases\u003c\/li\u003e\n\u003cli\u003eA lighthouse mystery with a ghost ship\u003c\/li\u003e\n\u003cli\u003eBlack and white pages, easy to copy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWant more cases like these?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFollow Kiwiland Education to discover more CSI Mini Mystery Detective cases, no-prep math activities, and detective-themed printables for elementary classrooms.\u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\"\u003ehttps:\/\/www.teacherspayteachers.com\/Sellers-Im-Following\/Add\/Kiwiland\u003c\/a\u003e\u003c\/p\u003e","brand":"Kiwiland Education","offers":[{"title":"Default Title","offer_id":62593089306994,"sku":"17732977","price":4.5,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2848\/0626\/files\/measuring-angles-with-a-protractor-worksheet-4th-grade-math-detective.jpg?v=1792613128","url":"https:\/\/kiwilandeducation.com\/products\/measuring-angles-with-a-protractor-mystery-detective","provider":"Kiwiland Education","version":"1.0","type":"link"}