S1 Lines, angles and polygons
... into is always two less than the number of sides. We can say that: A polygon with n sides can be divided into (n – 2) triangles. The sum of the interior angles in a triangle is 180°. ...
... into is always two less than the number of sides. We can say that: A polygon with n sides can be divided into (n – 2) triangles. The sum of the interior angles in a triangle is 180°. ...
Bank of Reason: Chapter 1
... 11.) The perimeter of ∆ABC is 32m. AB = 4x – 2, BC = 3x + 1, AC = 2x + 6. Write an equation and solve for x. Then, classify the triangle as scalene, isosceles, or equilateral. (Hint: draw a picture first and label what you know) ...
... 11.) The perimeter of ∆ABC is 32m. AB = 4x – 2, BC = 3x + 1, AC = 2x + 6. Write an equation and solve for x. Then, classify the triangle as scalene, isosceles, or equilateral. (Hint: draw a picture first and label what you know) ...
Year 10 GCSE Maths (Higher Tier)
... Draw 3D shapes using isometric grids; Understand and draw front and side elevations and plans of shapes made from simple solids; Given the front and side elevations and the plan of a solid, draw a sketch of the 3D solid; Use and interpret maps and scale drawings, using a variety of scales and units; ...
... Draw 3D shapes using isometric grids; Understand and draw front and side elevations and plans of shapes made from simple solids; Given the front and side elevations and the plan of a solid, draw a sketch of the 3D solid; Use and interpret maps and scale drawings, using a variety of scales and units; ...
Applying Angle Theorems - the Mathematics Assessment Project
... Support student problem solving Try not to focus on numerical procedures for deriving answers. Instead, ask students to explain their interpretations and use of the different methods. Raise questions about their assumptions and prompt for explanations based in angle theorems to encourage precision ...
... Support student problem solving Try not to focus on numerical procedures for deriving answers. Instead, ask students to explain their interpretations and use of the different methods. Raise questions about their assumptions and prompt for explanations based in angle theorems to encourage precision ...
Trigonometric functions
In mathematics, the trigonometric functions (also called the circular functions) are functions of an angle. They relate the angles of a triangle to the lengths of its sides. Trigonometric functions are important in the study of triangles and modeling periodic phenomena, among many other applications.The most familiar trigonometric functions are the sine, cosine, and tangent. In the context of the standard unit circle (a circle with radius 1 unit), where a triangle is formed by a ray originating at the origin and making some angle with the x-axis, the sine of the angle gives the length of the y-component (the opposite to the angle or the rise) of the triangle, the cosine gives the length of the x-component (the adjacent of the angle or the run), and the tangent function gives the slope (y-component divided by the x-component). More precise definitions are detailed below. Trigonometric functions are commonly defined as ratios of two sides of a right triangle containing the angle, and can equivalently be defined as the lengths of various line segments from a unit circle. More modern definitions express them as infinite series or as solutions of certain differential equations, allowing their extension to arbitrary positive and negative values and even to complex numbers.Trigonometric functions have a wide range of uses including computing unknown lengths and angles in triangles (often right triangles). In this use, trigonometric functions are used, for instance, in navigation, engineering, and physics. A common use in elementary physics is resolving a vector into Cartesian coordinates. The sine and cosine functions are also commonly used to model periodic function phenomena such as sound and light waves, the position and velocity of harmonic oscillators, sunlight intensity and day length, and average temperature variations through the year.In modern usage, there are six basic trigonometric functions, tabulated here with equations that relate them to one another. Especially with the last four, these relations are often taken as the definitions of those functions, but one can define them equally well geometrically, or by other means, and then derive these relations.