Classifying Triangles
Grade 4 · Math · Measurement and Geometry · Oklahoma, USA
Lesson Summary
Triangles can be sorted by the length of their sides or the size of their angles.
Explanation
An equilateral triangle has all three sides the same length and all three angles equal to 60 degrees. An isosceles triangle has exactly two sides the same length. A scalene triangle has all three sides of different lengths. You can also classify triangles by their angles: a right triangle has one 90-degree angle, an acute triangle has all angles less than 90 degrees, and an obtuse triangle has one angle greater than 90 degrees.
Practice Questions
Q1: A triangle has sides of 5 cm, 5 cm, and 5 cm. What type is it?
Answer: Equilateral, because all three sides are equal.
Q2: A triangle has sides of 3 cm, 4 cm, and 5 cm. What type is it by its sides?
Answer: Scalene, because all three sides are different lengths.
Q3: A triangle has angles measuring 30, 60, and 90 degrees. What type is it by its angles?
Answer: Right triangle, because it has a 90-degree angle.
People Also Ask
What is Classifying Triangles in Grade 4 Math?+
Classifying Triangles is a lesson in the Measurement and Geometry chapter of Grade 4 Math. It is part of the Oklahoma, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Classifying Triangles?+
Classifying Triangles is taught in Grade 4 as part of the Math curriculum in Oklahoma, USA.
How can I help my child with Measurement and Geometry in Math?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Measurement and Geometry topics.