Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Curated OER
Altitudes & Orthocenters: Making Connections...
This site describes altitudes and orthocenters in triangles and their connections with the nine-point circle.
Cuemath
Cuemath: Median of a Triangle
This lesson explores the equation of the median of a triangle formula, sum of medians of a triangle, altitude of a triangle, median of equilateral triangle formula, and median of a triangle definition while discovering the interesting...
National Council of Teachers of Mathematics
The Math Forum: Problems Library Geometry Triangles
This site contains a wealth of problems that deal with the basic definitions of medians, altitudes, angle bisectors, and perpendicular bisectors or the defining characteristics of the different types of triangles. There are also...
University of Cambridge
University of Cambridge: Maths and Sports: Little Little G
Could the altitude of the city hosting the Olympic and Paralympic Games have an effect on performance in the long jump? This challenging activity encourages mathematical reflection, investigation and discussion as students explore how...
Illustrative Mathematics
Illustrative Mathematics: 6.g Same Base and Height, Variation 2
This is the second version of a task asking students to find the areas of triangles that have the same base and height. This presentation is more abstract as students are not using physical models. They still determine the area of each...
Cuemath
Cuemath: Point of Concurrency
Learn all about the point of concurrency. This lesson targets the point of concurrency of perpendicular bisectors, the point of concurrency of the angle bisectors of a triangle, and has interesting solved examples and practice questions.
Calculator Soup
Calculator Soup: Right Triangles Calculator
Use this calculator to find the unknown angles in a right triangle using the Pythagorean Theorem. Once you know the sides you can calculate the perimeter, semiperimeter, area, and the altitudes.
Calculator Soup
Calculator Soup: Isosceles Triangles Calculator
Use this calculator to find the sides, perimeter, area, semiperimeter, and altitude of an isosceles triangle.
Calculator Soup
Calculator Soup: Equilateral Triangles Calculator
An equilateral triangle is a special case of a triangle where all 3 sides have equal length and all 3 angles are equal to 60 degrees.