Angles and Triangles

This resource consists of two interactive excel programs. The first deals with basic angle facts and recognition of types of triangle. Depending on how it is used, the second could require the use of Pythagoras' Theorem and trigonometry. The second excel file could also be used to provides problems relating to the recognition of different types of triangle.

Angle Facts This interactive excel file presents students with questions relating to angles on a straight line, angles at a point, and angles in triangles and rectangles. The sheet on angles and parallel lines does not use the words "corresponding" or "alternate" but the F or Z shape can be shown on the diagram. There are also three interactive sheets on angles in scalene, isosceles and equilateral triangles. There are a further thirteen sheets of questions suitable for duplication for classroom use. 

Triangles: What Type, Angles, Area The first two sheets show a triangle on a coordinate grid. Students can calculate the length of sides, the angles and the area of each triangle. Alternatively, students can click to reveal the lengths and angles and state the type of triangle. The third sheet shows a triangle, the size of angles can be revealed and students say whether the triangle is scalene, equilateral or isosceles. There are a further eight sheets of questions on similar topics suitable for duplication for classroom use.

Note This program was designed by be viewed on a screen with a resolution of 1024 x 768. Users may have to adjust the resolution of their screen for the pages to display as was originally intended. The program uses macros which need to be enabled on users’ machine.