This document discusses perimeter and area concepts related to circles such as circumference, radius, diameter, sectors, segments, and combinations of circles and other shapes. It provides examples of calculating the circumference and area of circles, sectors, and segments. It also gives word problems involving finding radii, circumferences, areas, and lengths of arcs and sectors for circles alone or combined with other shapes. The key formulas discussed are the circumference formula C=2Ï€r, area of a circle formula A=Ï€r^2, and formulas for finding sector and segment areas and arc lengths.
This document provides information about mensuration and geometry topics such as trapezoids, rhombuses, cubes, cuboids, cylinders, and their formulas for area, surface area, and volume. It includes definitions and examples of each shape. There are also example problems, tables summarizing the formulas, and a multiple choice and short answer question bank related to mensuration. The document was created by Arnav Gosain of VIII-C at Tagore International School for the purpose of learning about geometry topics involving area, surface area, and volume calculations.
This presentation defines and explains different types of angles. It begins by defining an angle as being formed by two rays with a common endpoint, called the vertex. It then discusses naming angles, types of angles such as acute, obtuse, right, zero and reflex angles. It also covers pairs of angles including complementary angles which sum to 90 degrees, supplementary angles which sum to 180 degrees, adjacent angles which share a vertex and side but not an interior section, vertically opposite angles formed by two intersecting lines, and linear pairs which are adjacent angles that sum to 180 degrees.
www.AulasDeMatematicaApoio.com.br - Matemática - Semelhança de TriângulosBeatriz Góes
Ìý
O documento discute semelhança de triângulos, definindo-a como triângulos que têm ângulos correspondentes congruentes e lados homólogos proporcionais. Apresenta casos de semelhança como LLL, LAL e AA e o Teorema Fundamental da Semelhança, que estabelece que uma paralela a um lado determina dois triângulos semelhantes. Discutem razão de semelhança e exemplos de cálculos envolvendo triângulos semelhantes.
1. Um prisma pode ser reto ou oblÃquo. Um prisma regular tem bases polÃgonos regulares e faces retangulares.
2. O documento fornece fórmulas para calcular a área da base, área lateral e área total de prisma, bem como o volume. Exemplos mostram cálculos para prisma triangular, quadrangular e hexagonal.
This document discusses the properties and formulas for calculating surface areas of cubes and cuboids. A cuboid has six rectangular faces, eight vertices and twelve edges. The total surface area of a cuboid is the sum of all rectangular faces. The lateral surface area excludes the top and bottom faces. A cube is a special type of cuboid where all dimensions are equal. It has six square faces, eight vertices and twelve edges. The total surface area of a cube is 6 times the area of one face (6a2) and the lateral surface area is 4 times the area of one face (4a2). Examples are provided to demonstrate calculating surface areas using given dimensions.
This document provides information about mensuration and geometry topics such as trapezoids, rhombuses, cubes, cuboids, cylinders, and their formulas for area, surface area, and volume. It includes definitions and examples of each shape. There are also example problems, tables summarizing the formulas, and a multiple choice and short answer question bank related to mensuration. The document was created by Arnav Gosain of VIII-C at Tagore International School for the purpose of learning about geometry topics involving area, surface area, and volume calculations.
This presentation defines and explains different types of angles. It begins by defining an angle as being formed by two rays with a common endpoint, called the vertex. It then discusses naming angles, types of angles such as acute, obtuse, right, zero and reflex angles. It also covers pairs of angles including complementary angles which sum to 90 degrees, supplementary angles which sum to 180 degrees, adjacent angles which share a vertex and side but not an interior section, vertically opposite angles formed by two intersecting lines, and linear pairs which are adjacent angles that sum to 180 degrees.
www.AulasDeMatematicaApoio.com.br - Matemática - Semelhança de TriângulosBeatriz Góes
Ìý
O documento discute semelhança de triângulos, definindo-a como triângulos que têm ângulos correspondentes congruentes e lados homólogos proporcionais. Apresenta casos de semelhança como LLL, LAL e AA e o Teorema Fundamental da Semelhança, que estabelece que uma paralela a um lado determina dois triângulos semelhantes. Discutem razão de semelhança e exemplos de cálculos envolvendo triângulos semelhantes.
1. Um prisma pode ser reto ou oblÃquo. Um prisma regular tem bases polÃgonos regulares e faces retangulares.
2. O documento fornece fórmulas para calcular a área da base, área lateral e área total de prisma, bem como o volume. Exemplos mostram cálculos para prisma triangular, quadrangular e hexagonal.
This document discusses the properties and formulas for calculating surface areas of cubes and cuboids. A cuboid has six rectangular faces, eight vertices and twelve edges. The total surface area of a cuboid is the sum of all rectangular faces. The lateral surface area excludes the top and bottom faces. A cube is a special type of cuboid where all dimensions are equal. It has six square faces, eight vertices and twelve edges. The total surface area of a cube is 6 times the area of one face (6a2) and the lateral surface area is 4 times the area of one face (4a2). Examples are provided to demonstrate calculating surface areas using given dimensions.