Mathematics
Grade 7
15 min
Classify triangles
Classify triangles
What you'll learn
- Identify triangles as acute, right, or obtuse based on their angle measurements with 80% accuracy.
- Classify triangles as equilateral, isosceles, or scalene based on the lengths of their sides with 80% accuracy.
- Apply the triangle inequality theorem to determine if three given side lengths can form a triangle, justifying their answer with a clear explanation in at least 2 out of 3 attempts.
- Explain the relationship between angle measures and side lengths in classifying triangles, providing at least two examples in a written response.
Tutorial Preview
1
Classify a triangle with angles 40°, 60°, 80°.
2
Classify a triangle with side lengths 7 cm, 7 cm, 10 cm.
3
Classify a triangle with angles 90°, 30°, 60°.
Sample Practice Questions
Easy
A triangle has angles 30°, 70°, 80°. What kind of triangle is it?
0.Acute
1.Obtuse
2.Right
3.Scalene
Easy
A triangle has side lengths 6, 6, 6. What kind of triangle is it?
0.Isosceles
1.Scalene
2.Equilateral
3.Right
Easy
A triangle has angles 110°, 40°, 30°. What kind of triangle is it?
0.Acute
1.Obtuse
2.Right
3.Isosceles
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Frequently asked questions
What grade level is "Classify triangles"?
Classify triangles is a Grade 7 Mathematics lesson on ExcelOS.
What will I learn in Classify triangles?
You'll be able to: Identify triangles as acute, right, or obtuse based on their angle measurements with 80% accuracy; Classify triangles as equilateral, isosceles, or scalene based on the lengths of their sides with 80% accuracy; Apply the….
Is "Classify triangles" free to practice?
Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.
How many practice questions are included with Classify triangles?
This lesson includes 25 practice questions across multiple difficulty levels, each with instant feedback and explanations.