Concept explainers
Here we celebrate the power of algebra as a powerful way of finding unknown quantities by naming them, of expressing infinitely many relationships and connections clearly and succinctly, and of uncovering pattern and structure.
Is x big enough? A triangle drawn on the sphere has angles measuring 80,90 and x dcgrees. If x satisfies the equation
(There’s only one value for x that works. What is it and why?)
Want to see the full answer?
Check out a sample textbook solutionChapter 4 Solutions
The Heart of Mathematics: An Invitation to Effective Thinking
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