The cosine rule

Subject: Mathematics

Grade: Upper Secondary

Publisher: YDP

Resource types: Whiteboard presentation

Resource ID: f2085
Description:

At the end of this activity, students should be able to:
– find the missing sides of a triangle using the cosine rule
– find the angle of a triangle using the cosine rule
– apply the cosine rule in real-world problems (bearings).

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The cosine rule Class activity

Consists of...
The law of cosines Animation Two points on the s... Animation The cosine rule Whiteboard exercise The cosine rule –... Animation Finding side Whiteboard exercise The cosine rule lea... Animation Finding angle Whiteboard exercise Finding angle – o... Whiteboard exercise The area of a triangle Whiteboard exercise Heron's formula Animation The area of a quadr... Whiteboard exercise An application of t... Whiteboard exercise Bearings and compas... Animation Bearings Whiteboard exercise A plane and the wind Whiteboard exercise

Relevant to...

Secondary School

Upper Secondary (Grades 10-12)

Mathematics

Trigonometry (1)

58. The cosine rule

YDP SA

Keywords

side, area, bearings, angle, rule, triangle, sine, cosine, The cosine rule

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