【中１　数学】　空間図形１１　円錐　（１２分）

Watch all the lessons from Try's talented instructors for free! Try IT video lessons for junior high and high school students are designed to be easy to understand! You can use them to prepare and review for school, as well as for regular tests and exam preparation. The lessons are taught by top instructors with plenty of teaching experience, who are known for their fun and easy-to-understand teaching methods. *This lesson is a video created during the old curriculum. *Please be careful when watching it to prepare for entrance exams or regular tests for the new curriculum. If you watch the video and think, "It's easy to understand!" or "I want to take a class like this!", Try's individual instruction may be right for you. For details on Try's individual instruction service, to request materials, or to contact us, please click here. https://bit.ly/4hjhKSE In addition, +‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥+ Try offers free video lessons, "Try IT," to support home learning. "Try IT" can be used free of charge even by non-members. Please use it to prepare for exams and improve your home study. Video Lessons Try IT Official Website: https://bit.ly/4jLULBg +‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥‥+ In this video lesson, you can learn about "11 Cone, Spatial Figures, Math, 1st Year Junior High School" in about 12 minutes. The key to solving the problem is that the circumference of the base = the arc length of the sector on the side. Please watch the video lesson in the following order: [Key Points] ⇒ [Examples] ⇒ [Practice] ⇒ [Summary]. If you have any questions about a unit other than this one, please click on the URL below. You can watch the video lessons for each unit together. ■If you have any questions about "1st Year Junior High School Math", click here! ・1st year middle school math: positive numbers and negative numbers https://goo.gl/ZYh7oF ・1st year middle school math: addition and subtraction https://goo.gl/fPdVf2 ・1st year middle school math: multiplication and division https://goo.gl/W5TfW1 ・1st year middle school math: arithmetic operations https://goo.gl/IKTZTB ・1st year middle school math: letters and expressions https://goo.gl/44YCfW ・1st year middle school Math Word problems and geometric problems https://goo.gl/UylVQs ・1st year middle school math Equations containing letters https://goo.gl/iij9FU ・1st year middle school math Equalities and inequalities https://goo.gl/bqV2sz ・1st year middle school math Equations https://goo.gl/s8FoQA ・1st year middle school math Moving terms in equations, etc. https://goo.gl/pUdpM9 ・1st year math: Equation word problems https://goo.gl/xlIUKW ・1st year math: Proportional and inverse proportional https://goo.gl/JkX9ha ・1st year math: Proportional graph https://goo.gl/5zu5Jo ・1st year math: Inverse proportional graph https://goo.gl/ZYo2qY ・1st year math: Proportional and inverse proportional word problems https://goo.gl/hHBNx0 ・1st year math: Plane figures https://goo.gl/Pb7d0R ・1st year math: Spatial figures https://goo.gl/WQEAM9 ・1st year math: Data dispersion and representative values https://goo.gl/36I3JV ・1st year math: Approximate values and significant figures https://goo.gl/Kxj7uE ■If you have any questions about "2nd year math", click here! ・2nd year middle school math: Expression calculation https://goo.gl/0kYGrD ・2nd year middle school math: Calculating monomials https://goo.gl/Zj7REc ・2nd year middle school math: Multiplication and division of algebraic expressions https://goo.gl/2h0Mj3 ・2nd year middle school math: Simultaneous equations https://goo.gl/kQyDvt ・2nd year middle school math: Word problems involving simultaneous equations https://goo.gl/MB g0ha ・2nd year middle school math: Linear functions https://goo.gl/2QCSNd ・2nd year middle school math: Linear function graphs https://goo.gl/z8xJPb ・2nd year middle school math: Linear equations https://goo.gl/GV6bi7 ・2nd year middle school math: Linear equations with two unknowns https://goo.gl/PxH6HO ・2nd year middle school math: Linear function word problems https://goo.gl/ eILPkI ・8th grade math: Properties of shapes https://goo.gl/8V4rbJ ・8th grade math: Congruence of shapes https://goo.gl/RZCuIr ・8th grade math: Tips for proving shapes https://goo.gl/C4FXWD ・8th grade math: Proof of a triangle https://goo.gl/bIKD6R ・8th grade math: Proof of a parallelogram https://goo.gl/G8PYjO ・8th grade math: Relationship between triangles and quadrilaterals https://goo.gl/hdSWgb ・8th grade math: Probability https://goo.gl/qLyj7y ・8th grade math: Probability and combinations https://goo.gl/84wAvC ・8th grade math: Probability and complementary events https://goo.gl/vSVtLb ■Click here if you have any questions about "9th grade math"! ・3rd year middle school math: Calculating monomials and polynomials and multiplication formulas https://goo.gl/PqOeNg ・3rd year middle school math: Prime factorization https://goo.gl/WAo2pO ・3rd year middle school math: Factorization https://goo.gl/UTDgS7 ・3rd yea...