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This Alternate Formula for the Area of a Triangle: Alternate Area of a Triangle interactive also includes:
It's always nice to have a plan B. Pupils investigate an alternate formula for the area of a triangle that uses sine. A set of challenge questions shows how the new formula relates to the well-known formula of (1/2)bh.
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Instructional Ideas
- Use the resource to introduce the formula for the area of a triangle involving sine
Classroom Considerations
- Users need to set up a free CK-12 account
- Learners must be aware of the sine ratio
Pros
- Interactive is easy to use
- Provides immediate feedback to challenge questions
Cons
- None