# Angles

## Sir Cumference and the Great Knight of Angleland

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On a quest to earn his knighthood, Radius uses different geometry concepts to find and rescue a missing king.

Keywords: king, heir, geometry, math, quest, puzzles, knight

## A Tangled Web

In this math game you control a tiny robotic spider named Itzi, who lives with his family at the top of a strange old grandfather clock.

## Trigonometry Part 2 (2004)

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--tangent, sine and cosine ratios
--using a trigonometric ratio to calculate the lengths of the other sides of a right triangle when an angle and one side length are known
--using a trigonometric ratio to calculate an angle of a right triangle when two side lengths are known
--using the mnemonic acronym SOHCAHTOA

Middle
High
Length:
00:29

## Trigonometry Part 1 (2004)

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--similar triangles
--finding an unknown height in a similar triangle
--tangent ratios of varying angles
--using a calculator to find the tangent ratio of any angle
--using tangent ratios to find an unknown adjacent or opposite side length

Middle
High
Length:
00:22

## Naming and Measuring Angles (2006)

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This program provides students with a lively introduction to key concepts involved with angles, such as how we define and write information about an angle, mathematical notation for rays, line segments and lines, and how to use a protractor.

Middle
High
Length:
00:23

## Geometric Constructions (2006)

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The program demonstrates the following constructions in the context of a student creating a mobile to hang above a baby's cot: * Bisecting an angle * Perpendicular bisector of a line * Constructing a triangle using three known side lengths * Determine the center of gravity by constructing medians * Determine the inscribed circle of a triangle by constructing the angle bisectors * Determine the