Mathematics — first biennium · Lesson
A triangle can be classified at the same time by its sides and by its angles: the two classifications describe different features.
In this lesson: Classify a triangle by sides and by angles while keeping the two classifications distinct.
How to proceed: Read the two kinds of data separately: first compare side lengths; then check whether one angle is 90°, greater than 90°, or whether all are less than 90°.
You can already assume: Geometric objects and angles.
Completed exercises: 0/5 · Correct on first attempt: 0
Read the two kinds of data separately: first compare side lengths; then check whether one angle is 90°, greater than 90°, or whether all are less than 90°.
Given data: AB=7, AC=8, BC=9; ∠A=73°, ∠B=59°, ∠C=48°
ConceptStep separates what is required from what is recommended or useful as reinforcement. Only required prerequisites block your progress.
Relationships: solid line = required · dashed line = recommended · dotted line = reinforcement.